How to Escape from Quicksand (With the Coast Guard's Help)

We've written about strategies for escaping quicksand before, but it's even more interesting to see the act captured on video.
In this National Geographic video, Jonny Phillips gets himself stuck in quicksand on an English beach, then coast guard rescuers free him.
Okay, that's great. But what if you're in the wilderness and have no rescuers to call? Let's just hope you're Bear Grylls:
Yeah, I think I'm doomed if I fall into quicksand. I'll just stay at home, thanks.