People never locking up their lockers, or even closing them.
Being able to hang at coffee shops and restaurants all day, every day.
Most car explodes at the slightest touch.
Getting mutant powers.
Alien invasion.
snakes on planes.
One man with an infinite ammo gun against hundreds of helpless soldiers with seemingly no training and accuracy.
Jumping cars that can survive the jump and then keep on rolling like nothing happened.
Disarming a bomb by cutting "the red wire" with 5 seconds left on the very visible timer.
Face masks so real, they even change proportions and structures.
Somehow, if you shoot enough times in the air randomly by closing your eyes each time, you'll kill all the bad guys in the room...
If you're not a stormtrooper.
Removing an arrow in the field is a completely real procedure and does not produce bleeding to death in the next minute(s).
Katana fights with clashing swords.
flipping around while sword fighting will give you advantages, and not just exposing your back to your enemy.
Pretty much any sword fight choreography, for that matter.
Instant knockout gas/injection/chloroform.
Sucking poison out.
and so, so much more.