Yes, and that applies to Roaring Rapids, Radiator Springs racers and most certainly the roller coasters in the parks.
Mondolines do a great job of slicing vegetables but you pay a price for that, and the price is BLOOD. You will be gashed.
Similarly, if you drop anything in the bathroom, don’t make a grab for it, you might knock it into the toilet.
I’ve heard this saying on some (of the many) cooking shows I’ve watched:
“A falling knife has no handle.”
(IOW, act as if it has no handle and don’t reach for it.)
This goes for anything sharp. I work with X-Acto knives a lot, and have learned this the hard way. If you fumble with it, just jump out of the way and let it fall.
Liquid dishwasher detergent contains bleach. Be careful not to splash it on your clothes.
That store brand cleaner also contains bleach. Be careful not to get that on your clothes, too (or don’t wear nice clothes while cleaning with it).
I really like this saying. I could see it cross-stitched or something, with a knife off to the side, or maybe bright-red drops off some of the letters.
Ain’t that the truth. Used to live with someone who considered the oven to be a “pizza storage box.”
Greasy cardboard in a preheating oven. What could go wrong?
Wear the appropriate gloves. Light gardening gloves are not a substitute for leather gloves for doing heavy gardening work and/or moving furniture.
If you have access to protective equipment, such as steel-toed shoes, safety goggles, etc., use them outside work if the occasion calls for it. This is according to my company safety people, as accidents outside of work are also covered by worker’s comp. This is for Switzerland, so it might be not encouraged by companies in other countries. I’ve had coworkers come in on Monday with injured hands and feet due to injuries which would have been prevented by protective equipment they had sitting at their desk.
Take care of your pain-free knees and back while you have them. Someday you may not.
In the summer, give anything wasps may build nests in/on a swift kick or poke from a distance before grabbing them and moving them.
Rolling tool box, ladder, pipe gate, large collection of baling twine hung on a nail, wide plastic rake hung correctly (for once), plastic flip-lid storage tote … all of these have bitten me in the past.
When using a power washer, wear heavy duty boots. That way, when you get muck on your foot, and reflexively use the power washer to clean it off, you don’t take your foot apart in doing so.
Fortunately my shoe protected me enough to just leave a raw streak across my foot. The shoe was history though.
I like that idea! On potholders, kitchen towels, and the like.
The other day I had occasion to remove a live baby possum (no bigger than an egg) from my hallway where I assume one of the cats had left it. I have thick, leather, elbow-length BBQ gloves, which were just the right gloves for the job. I easily picked up the little feller and put him out in the back yard. 
Also glass bottles- they may make a mess all over the floor, but that’s better than stabbing yourself and getting what appears to be permanent nerve damage in your hand.
And this was not from me, but someone I met backpacking; never take peyote in a bushfire.
Do not get into a massively overcrowded train when your backpack is hanging out the open door, and the door handle is slippery due to pouring rain. 
Seriously, don’t.
Also, never step out of a moving train facing opposite the direction the train is moving in.
Paid with a few bruises for these gems of wisdom, but the price could have been far worse.
Next: State of California mandates that all knife handles be labeled “This Is Not A Handle”
The rules of a research lab when something spills, falls, etc. can be condensed to “get out of the way”.
It might be hot enough to burn you
It might be cold enough to burn you
It might be under enough pressure to blow up
It might be sharp enough to cut you
It might contain or be coated in a strong acid or base
Same is also true of soldering irons – something that young technicians and engineering students have not previously come in “contact” with.
Not just a “research lab”. The pretend lab I had as a kid would also qualify. My parents got me a “chemistry set” which was pretty innocuous, but it spurred an interest in doing more “interesting” stuff by buying various chemicals through mail order. I would do things like generating pure oxygen and then seeing how things burned in it. One of the things I had was a big roll of magnesium ribbon, which burned very hot and bright in ordinary air. Natch, I had to see how it burned in pure oxygen (hint: a tiny amount of magnesium filament in pure oxygen was what old-fashioned flashbulbs were made of). It’s a wonder that I never blew myself up, or even set the house on fire.
*Never purchase anything simply just because you plan on reselling it later to make a profit, unless it’s so cheap you can easily eat the cost if you never sell it.
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Always wait until the car in front of you at a red light is well on their way forward before letting go of your own brake, lest they randomly slam on their own brakes two seconds in.
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If somebody asks you to buy them something expensive and hard to find but they’ll pay you back, get their cash FIRST then buy. Otherwise if they randomly decide to back out you’re fucked.
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If your ex-girlfriend asks you to give her $1,500 as a “loan” to help pay the rent on the apartment you shared together before you broke up and moved out, make sure she’s actually still living at that apartment and didn’t simply sell it and is already living with her new boyfriend.
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Never lie about the size of your penis to anyone you plan to date, because at some point no matter how long it takes they’ll eventually call you out on it.
Hmm. Wouldn’t this imply that lying about your size to someone will guarantee that things will progress to the point where penis ensues?