After watching the video the Matt put together for a wheelin' trip to BMRA, this might me a good item to bring up, along with Safety on the trails.
Ok, I will start with Safety
When you feel that your rig is about to turn over, DO NOT try to use your arm or leg to stop the rig. Two items I know, 1st - it will not stop you and 2nd - it looks stupid and your friends laugh at you for doing it.
Using a Spotter
Use only one spotter.
Use a spotter that you trust.
Listen to that one spotter and do what they say.
Don't try to our guess what the spotter is saying. If you do, you will get in a worse shape than what you were before you asked for the spotter.
Being a Spotter
Know the skill of person you are spotting is possible
Make sure you know about the rig setup
Try to make sure the driver is listening to you
Be patient with the driver.
Please add you comments, additions or suggestions