If you need proof of this, check out this video, which shows a couple of guys attempting to tow a Jeep that's stuck in the sand. The problem is, the Jeep is really good and stuck, and they attempt to extract it by tying a rope to the bumper of another Jeep.
It ends badly. Really badly.
I feel pretty bad for the guy who got sliced in the hand, but having taken part in some extremely questionable tows in my life, I have learned that it's best to stand back when these things happen.
Also, bonus points for the guy who uploaded this video and played the totally unnecessary "Back in Black" at the end. That's awesome.
Hat tip to RX_37!