Don't get us wrong -- it is totally possible for electricity to ruin your day in the bathroom. If you're holding a hair dryer and you're soaking wet, your body may very well be the best path from the dryer to ground. And along the way, the current is likely to make a rest stop at your heart, and not pick up the trash when it's done.
But you're still more likely to slip and crack your head on the porcelain.
This is why, if you are in a newer house, your bathroom outlets have little black and red buttons on them. They're supposed to trip and shut off the current if some dumbass tries to dry his mullet in mid-shower.
According to Hollywood:
Drop a cigarette into a pool of gas leading to the car with the bad guys in it, and you're just seconds away from an explosion. Or light the trail of fuel left by a leaking jet on take-off, and watch it turn into a nice fireball (we're looking at you, Die Hard II).
Obviously gasoline is really good at burning, that's why it makes a good fuel. But getting it to explode takes real effort. That's also why it makes a good fuel. You don't want every stray spark doing a Michael Bay on your gas station.
To that end, liquid gasoline doesn't explode at all -- you can drop lit matches into a bucket of gasoline in cold weather, and the match will probably just go out. (NOTE: We said PROBABLY.)
So smoking at the gas pump? Totally safe.
It's the vapor you have to worry about -- those tiny particles swirling in the air are what is catching fire when you throw a match onto a pool of gas. But to get an honest-to-goodness explosion takes a lot of vapor mixed with oxygen, and only in the right amounts. You can get it in tanks with just a little gas left in them, but as the Mythbusters have demonstrated on numerous occasions, you can do just about anything to a car and it won't explode.
Now, if you get a car burning, the fuel tank will eventually burst, and then maybe you'll get a nice fireball as all the gas combusts. But more often than not the fire will just burn steadily until all of the fuel is gone.
You're no fun anymore, gasoline.
Jet planes are even less likely to go Boom. Turbine (jet) powered aircraft use Jet-A, which is an aviation fuel that has a flash point of 100F. So certainly on that snowy day in Washington, John McClane wasn't going to have much in the way of fumes to ignite. Yes, transportation safety guidelines ruin yet another action movie premise. We're wondering if it's all really worth it.
For more things movies got wrong, check out 5 Ridiculous Gun Myths Everyone Believes (Thanks to Movies) and 8 Scenes That Prove Hollywood Doesn't Get Technology.