In Hollywood, all guns make rattling noises every time they are touched and sound like their actions are being cycled every time they are pointed at a target.
In Hollywood, all bullets have perfectly flat trajectories and will hit exactly where the laser sight is pointed regardless of the range.
In Hollywood, interior drywalls can stop bullets.
In Hollywood, McGarrett can one shot kill a guy on top of a five story tower while runing and shooting his snub-nosed .38 left handed.
Smooth bore muskets can be fired like repeating rifles in terms of both speed and accuracy.
And what's up with people jumping out of the way of phaser fire and taking cover behind cargo crates? Did we lose the ability to make a .50 cal that can shoot through block walls in the 25th century?