You can almost talk casually to all your skydiving friends on the way down. If you don't have a parachute, just cling on to someone who has got one and don't let go until you're down. At other times the smoker has no need of cigarettes. There's a deep humming in space, no doubt about it. Laser beams are visible in vacuum.
Spaceships always fly perpendicular to the same axis.
When two spacecraft encounter each other, they're always aligned on a plane and never approach at odd angles. All spaceships, no matter how small, have internal artificial gravity and no matter how badly your ship gets pummeled by the evil aliens in the evil alien ship, no matter how many external panels get blown away, no matter how many sparks or how much smoke pours out of your control panels, the artificial gravity will always keep working. There are tiny cameras mounted everywhere, on every panel, in your spaceship. Warp or hyper-drive will always fail at critical moments. Inertial dampers will always prevent passengers from being plastered against the walls during acceleration into warp speed, yet any explosion will send passengers reeling across the room.