In space, loud sounds, like explosions, are even louder because there is no air to get in the way. In space, constant thrust equals constant velocity. The larger a mechanical device is, the faster it moves. Armored Mecha are the fastest objects known to human science. Time stops for the hero whenever he does something 'cool' or 'impressive'.
Time slows down when friends and lovers are being killed and speeds up whenever there is a fight.
Even when the 'Bad Guys' are killed so quickly they didn't even see it coming, it takes them a while to realize they are dead. This is attributed to the belief that being evil damages the Reality Lobe of the brain. First Corollary - Anything that explodes bulges first. Second Corollary - Large cities are the most explosive substances known to human science. Nearly all things emit light from fatal wounds.