They've got better photos and videos at https://www.facebook.com/clackamasfire/posts/pfbid02RxUmxLowEdg2hoVNWWrKtz9Mr5XxtgecEgJuFsHkdLSZbdZgNNGxumhTP3KgZNHnl
Looks like they squeezed in one wooden wedge at a time until they could get the patient out from under it. So just winching an inch at a time, and making sure it couldn't drop back down to the starting position.
