sdgirl98

Correction: Gravity causes acceleration, not velocity. The group of mutineers fell through the open hangar because they were in motion from jumping, but they soon passed out of the artificial gravity field generated by the ship, and continued downwards, soon to be caught by the planet's natural gravity and become planet side pizza. As for the spider, he grabbed the flag and the rope gave way, so he flew away with it, and was too far to be affected by the gravity field once BEN reactivated it.

Correction: The minimum speed you need to escape a certain star's gravitational pull is function of the distance you are to it: the higher the distance, the less minimum speed you need. There is a certain critical distance, lesser than which the minimum speed to escape is higher than the speed of light, making it impossible to escape. However, if your distance to the star (in this case, a black hole) is higher than that critical distance, then you CAN escape from it if you have enough speed (lower than the speed of light). When they look in the direction of the black hole, we can see a black sphere that represents the black hole. The radius of that black sphere is more or less the said critical distance. In the movie, their distance to the black hole is higher than the critical distance, hence they can escape if they have enough speed (which they got from that "wave").