End of dream level Thread

Hey guys, i wanted to know two things
(Using source engine)

1. How do you create a white out as if you reach a certain point and everything fades into white, and if possible how does one start a level being completely white but fade into the level

2. How do you create your character essentially... get up after being knocked out. - For example, the first chapter of hl2 when you are about to meet Alyx Vance by the elevator and the combine taze you up some and she appears above you and you get up.

Cheers guys
big help! =P

these are simple things you can find on the valve developer wiki.