I would suggest by ej's ruling "digging in" is also not legal.
We spend a lot of time finding that spot, right there for you to shoot from. MANY times the footing is an issue for the shot.

I will make a deal with you guys, I will stop trying to add a bit of humor to the answers. I'm not very adept and it just muddies the water.
Then ej has to come along behind me and clean up my mess.
ken12