can someone teach me making these following stuff? i have some ideas i want to make with them.

weapons
1.a ladder spawned which dissappears after a minute
2.a mine which is destroyed by explosions or when someone walks by, and auto detonades after a minute.

vehicles
1.a warthog that have a boost which instead of the spectre way, it will like, boost for half a second, then stop for half a second which is strong enough to keep the warthog in air.
2.a vehicle that is dmt race like (not asking for actual vehicle) which have a boost that creates a glowing contrail behind and is strong enough to keep the vehicle on walls and ceiling.
3. making a vehicle that can drive on walls and ceiling like they were ground.

bipeds
1. making a biped walk on walls and ceiling like they were ground (tried, but the biped would fall off the ceiling alot), and that the camera will be in the same angle as the biped(like when the biped is on the ceiling, the camera would spin so the ceiling will be down).

bsps
1. can i change the gravity of the bsp so that you can walk on every surface freely
2. making a space bsp where everything is in midair and you could move in any direction and there wont be any "up" or "down".

projectiles
1. creating a lighting like projectile which can randomly change directon in low angle, bounce off surfaces, hit though vehicles (yes, it goes into vehicles) by chain spawning in the speed of light so it will actually look like lighting.

misc
1. is there anyway you could make something create "dark" instead on light (like blackholes and such).

thanx, black doom.