problems in space

Couple things that made me laugh other than the acting was the fundamental mistakes made in space. When the fighters are taking off from the battleship and reach the end of the runway they dip down as if there was gravity pushing them ....... and why is there a runway there anyway! When Forbes dies in the crash they push the wreckage off and it drops as if there was gravity!! Didnt understand why they didnt bulldoze the ship back inside and check if shes alive! And lastly when they are hiding on the asteroid, why does Paladin shout at everyone to be quite when sound cant travel through space.

Not being anal just thought it was pretty basic stuff that they overlooked, in fact it probably makes the movie better because it makes it worse. Does that make sense?