I just found this thread. Yes, I have gotten stuck on purpose besides the other scenario of thinking I'd make it through snow, sand or mud.
With a 4x4 truck, find soft or slick ground, spin out in 2wd and bury the back end to the hubs, bumper, differential, then slam the transfer case into low range 4wd. Two things either happen: you nurse or whip your truck out of the soft or slick stuff, or you bury the front end deep as the back end. If you rest the truck on its frame, axles, differentials, comes the hard part of getting each end or corner up out of its holes far enough to get it to move.
Another way to handle it is sink the back end, then rock the truck in 4wd, using boots on pedals to get going for a repeat performance.