If you are ever caught in quicksand you are not to panic but to relax, the more anxious you are, the quicker you sink. Then while keeping calm you need to find something that can help lift you out of the quicksand.
The difference between regular sand and quicksand is that quicksand is has worn of the granite rock. The granite rock has moisture which is washed out with the sand. wet, regular sand you can mould. wet quicksand you can get stuck in.