How does WWE do Buried Alive matches?

Easily by staying out of the hole in the first place and anyways they haven't had a buried alive match in years.

The way you escape a buried alive match is like this. When you get dropped into the hole. There is a door on both sides of the grave and when you get through the hole your supposed to lose the match. Every match like that is planned by the WWE before it happens because it's fake. If you should lose the match you go through the door when your time is up to fight and there is a path under the ring. You go in there and walk under ground and wait under the ring. Down there they have water and food and a walkie talkie so they can come out when the WWE arena is cleared with all the fans so they can't see them get out.

They have a trap door that allows an easy exit and a simple way to make an intresting match more intresting and a second mini trapdoor allowed Mark Calaway (Undertaker) to stick his hand up.