Haha.. I think you might be the only one who can imagine the shambler as a climber. In my view he is simply mounds of sexy white flesh, kind of like Marilyn Monroe but not really. And no footholds are going to hold his massive feet.
I once added an animation to the fiend where he hits a wall in midjump, gets his claws stuck in the wall, puts his feet up on the wall and pulls his claws out looney tunes style. It was going to be for Hammy Bob Quake, a humour mod, but I lost it

I had it QC coded up and everything, it looked pretty funny although I'm not a really good animator.
F. A. Špork, an enlightened nobleman and a great patron of art, had a stately Baroque spa complex built on the banks of the River Labe.