The number of bullets a gun can shoot is determined by an equation with variables D = danger level, V = number of villains and S = whether the shooter is the main character or a sidekick. It has nothing to do with the number of bullets the gun actually has.
Fists break car windows easily. And without hurting anyone.
If the villain has a daugher, she will fall for the good guy.
People can fall off of roofs and not get hurt.
Also, car explosions always, always, always happen when one person is standing just out of blast range to witness it. Usually they will have just realized, one second too late, that there is a bomb in the car and yelled "Noooooo!!!!" just before the blast.
And speaking of cars, people who have jumped/been pushed from a tall building to their deaths will land on a parked vehicle, dramatically crushing the roof.
And if the hero has a daughter she will be kidnapped.