If you have a valve stem core tool, which costs about $6, with just a little practice, you can very quickly pull the core out of a valve stem, and in about 30 seconds, flat tire. If you throw the valve stem into the distance, the car’s owner has to put on the spare, and if you flatten 2 tires, they will need 2 spares.
I have exacted revenge a time or two by inserting a small pebble into the core and screwing the cap not quite tightly. The tire will be flat in about fifteen minutes and there’s annoyance but no permanent damage.
Note to future self: Do not upset DesertDog.
Even if he leaves some of his kibble in the bowl, do not empty the bowl. Especially if you’ll be driving home on a steep, twisty desert road.
Back in the day, it was common to carry matches. A match is just about the right size to jam into a tyre valve.
Then there’s the time my brother and I gave somebody a locking gas cap, but did not give him the key.
He backed into her car in a parking lot and gave bogus insurance information. When our father called the number he gave his wife (?) blew him off. We swung by the address on his license, got the make and model of the car in the driveway with a dent, and at 2am the next morning the rest is history.
So, the metamorphosis sequence of a Treacherous Cretin is finally revealed.
A cop goes up to a know wanted criminal and simply says “You’re under arrest!” without even having his gun out, criminal immediately knocks out or shoots the cop and gets away.
I’ve made a lot of arrests over 25 years. Only a handful of times under very specific circumstances have I had my gun out. Never got knocked out or shot.
In 1970s TV, every time a car crashes or goes off a cliff, it bursts into a fireball. I swear, cars back then must have been made of Explodium.
Obligatory clip:
When my brothers and I watched CHiPs when we were kids, our game was “guess what’s about to explode this week,” because it seemed like something blowed up real good in just about every episode.
L.A. was a dangerous place back then.
Good ol’ Top Secret!. My dad actually owned a Pinto when the recall notice went out, and in 1980 – four years before Top Secret! came out, I’ll have you know – I filmed a home movie with a Pinto rear-end-collision explosion in it.
I finally converted said home movie into digital form, and put it up on YouTube a few years ago. It’s here – the Pinto explosion “commercial” starts at 1:29 :
Hey, that’s mighty cool! Didn’t you think of suing Zucker/Abrams/Zucker for stealing your joke? 
But of course! Except for the fact that I’d never made my film publically available at the time. (It was a silent movie camera, and I would’ve needed to tape record the sound track while watching the movie to make sure it would sync up. But we didn’t own a movie projector, we had to rent one, and before I could do my soundtrack recording the projector’s bulb burned out and we had to return it before it got fixed.)
Ah, that’s a bummer. If it weren’t for the burned out light bulb, you could have made movie history!
Maybe my situation is unique, but in my living room you may see things like: pillows out of place, fingernail clippers on the table by the couch, a blanket on the couch for the dog, a couple of balls on the floor that the dog was playing with, a bag of something that needs to be taken upstairs the next time I go up, etc. I don’t see things like that for television/movie people.
Almost exactly like at my place. I think the Dude’s apartment in “The Big Lebowski” looked a lot like that, but otherwise I’ve got nothing.
Yeah, I barely survived.
Not to mention that (according to Hollywood) every junkie convenience store robber was armed with a MAC-10.
Fire sprinkler systems that all go off when somebody sets off a fire alarm.
All the fire sprinkler systems I’m familiar with are fully-charged (‘wet’) systems where the water is released when the wax plug in the individual sprinkler head melts. (You can specify different set-points for hot environments).
I suppose in theory there must be ‘dry’ systems that spray everything everywhere when triggered, for use cooling fire-danger storage or processing facilities. Has anyone here worked with such systems? Are they ever used in schools or offices?