“Easy interbreeding between humans and aliens.”

See also here.
“Stop the Movie! Stop the Movie! Explosions don’t go ‘BOOM!’ in a vacuum!” —Gary Larsen, The Far Side
See also here.
“Stop the Movie! Stop the Movie! Explosions don’t go ‘BOOM!’ in a vacuum!” —Gary Larsen, The Far Side
They left out one of my pet peeves.
Things don’t make right angle turns in space, either. Unless they come to a full stop, change orientation, and then start off again in the new direction.
The same goes for making banked turns.