If you are waiting at a green light to turn left, the odds that the driver behind you will honk his horn to hurry you up is directly proportional to the number and speed of the pedestrians you are waiting for to cross the intersection.
If you are first in line at a left turn pocket with a permissive green light, the size of the empty gap in opposing traffic coming your way is proportional to the size of the jacked-up pickup truck in the opposing turn pocket that prevents you seeing that wonderful empty gap.
The pickup truck will turn left and clear your view just as the empty gap becomes too small for you to use. Thereby forcing you to wait another light cycle. By which time another jacked-up pickup truck will have arrived.
This is known as the Multi-Story Outhouse rule. 
THIS!
Oh and my own law
If you have a Wife/Girlfriend/Partner, if you like, they will hate it. Never fails.
Rocky’s 2nd Rule of Computer Gaming: When you are playing a game requiring undivided concentration, your spouse will interrupt at the most crucial point in the game, normally resulting your character’s death.
Enola’s Premium Refueling Law-if your car’s engine has 11/1 compression ratio or has intercooled turbos…thus requiring at least 93 octane…whoever has the pump before you gassed up with cheap 87.
The guy before you put 5 bucks in his Honda Civic, now you are shelling out $40 and
(tracing the route of fuel flow from underground tank, the pump, the hose, and nozzle)
the first gallon you paid $4.29 (and 9/10ths) is SHIT GAS!
Since the majority of cars use 87, it’s less a law than a certainty, no?
Also $4.29!? Are you a time traveller? If your location is still accurate, you should be paying $2.75 minimum, and you don’t even have to get out of the car there!
I donno, here where I live most have a separate nozzle for each type of gas.
If all your friends tell you that your new love interest is a jerk, s/he is a jerk.
Even if there’s only one nozzle, the connection where the [del]three[/del] two grades (low, high, or both mixed 50/50) join it is pretty close to where the hose leaves the dispenser. So you’re probably buying at most a quart of whatever the previous person bought. If he/she bought mid-grade, you’re buying at most a pint of the low grade and a pint of the good stuff.
IOW, relax.
Or buy your gas at a place where most of the cars are fancier. When 8 of 10 cars are the “right” kind you’re buying only a teaspoon of the cheap stuff per month on average.
If you’re gonna kibitz, you gotta help.
The law of spectacle-emollient entanglement: If there is an open container of moisturizer or lotion anywhere in the room, some of the content will, somehow, end up on my glasses.
The corollary of fingers: No matter how clean my glasses were five minutes ago, there is a big fingerprint on them now.
Back in my summer-camp-staff days, I came up with:
Any important piece of equipment will, by next summer, be just neglected enough not to work, but not so bad as to be thrown out and replaced.
King George V supposedly once said you should never pass up an opportunity to use the bathroom, have a drink, or sit down.
Preach it!
Also true.