It's not a fast process, and it takes a lot of people and a lot of time.

By the time he's buried to his chest, the corn shifts every time he exhales, preventing him from inhaling, and he will suffocate slowly.

You also have to think outside the box. There's no manual for a technical rescue like this. If you wait and become reactive, you lose. Plain and simple. It's mandatory you think several steps ahead for a technical rescue.