What to do if you wake up and are buried alive 

The heavy dirt above would pour in, meaning it would fill the space in seconds. Yeah, you can't dig up, you gotta dig down, let me explain. Alright, obviously if you dig up, the dirt's just gonna fill the coffin, no good. You're gonna have to dig down. Pop a hole in the coffin, and immediately start peeing. If you add liquid to dirt, it shrinks because it becomes more compact.

If you add liquid to dirt, it shrinks because it becomes more compact. Once the dirt gets loose, just simply start stomping it to increase the hole size.