Nothing spectacular. I bought my truck used from a law firm, was thier company truck, you should have seen the release they made my sign when I picked it up. 4 pages long and at least 50 signatures and initials, overkill? Yes. But I had no problem signing and reading it since I'm the type of person that takes care of my own shiat.
If I wrote up a release form, I would simply state:
-The person riding the equipment is fully responsible for thier own actions.
-That person will fix or replace any broken parts that they broke or damaged.
-This is a release of liability and the owner of the equipment is not responsible for the actions of the person riding.
Sign and date on the dotted line...
But I would never let anyone near my stuff if I knew them to be irresponsible, even with thier signature.
Gotta be selective and careful in this day and age of getting sued for anything.