Well, he's highly experienced and sometimes overoptimistic
If you don't land out, you're not trying
He did the test flight on a glider down for repair for over a year and went charging off while I wasn't finding anything that encouraged me to need finding another thermal to get home. The radio announced his landout a few miles down the road. Having enough altitude by then I did a flyover to find out where to bring the trailer.
We were talking on the radio and I let him know I'd get the trailer. On downwind the phone rang and I let him know I was busy
Then the phone ringed on short final
It was ignored until I came to a stop and I returned the call to another glider pilot.
Some weeks later, we were both in the air and able to get away, but not very far. He landed out 40 km away. This time I had suggested he have the trailer hitched before swanning off -- the right trailer was hooked up the second try after I suggested he check the reggie on the trailer