The+Good,+the+Bad,+and+the+Ugly+Physics

Good
Portal 2 While the fact that portal making is currently impossible may be true, this game does display another good example of physics. This example is the law of conservation of momentum. In the game, whenever you jump into one portal, you come out of the other one at the exact velocity that you went into the first one, and in the same direction. Also, your mass in the game will not change when going through a portal, so momentum is conserved. [] 2:40-3:00

Bad
Die Hard In almost all movies where people are shot, they are thrown back violently. One such example of this is "Die Hard." Throughout the entire movie, anytime anyone is shot, they go flying back, sometimes with enough force to break windows. This can be easily proven to be impossible by the momentum equation, p=mv. Because of this, the mass times the velocity of the bullet will equal the mass times the velocity of the person taking the bullet. The mass of an average person is about 70kg, The mass of an average bullet is about 0.0042 kg. The velocity of an average bullet from a handgun is about 240 m/s. So, 240*0.0042=70*v (of person). From this equation, it can be determined that the velocity of ther person will be about 0.0144m/s, which is not nearly high enough of a velocity to noticably move the person. (couldn't find good video from Die Hard 1, but this is very similar, bullet goes through Bruce Willis and sends other guy flying into and breaking glass) [] 0:40-0:46 Don't do sound, Bruce uses the phrase he frequently uses in these movies

Ugly
Star Wars Series Throughout every movie in the Star Wars series, the jedi have been able to deflect laser bullets witht their lightsabres. If the laser truly is a laser, that means it is traveling at or near the speed of light, which is 3x10^8 m/s. On many occasions, lasers are deflected from what seems like 5 meters. If light goes 3x10^8 m/s, that means that it takes 5/3x10^8 seconds or just 1.67x10^-8 seconds to get to the jedi. The average human reaction time is 0.215 seconds, which means that they would begin their reaction 12874251.5 times later than they would need to, assuming they could instantly move their lightsabre to deflect the laser. This obviously is not possible. [] 8:16-8:20