(Michael) wrote in message:

Bob gave me an A+ for my recognition and timely recovery from that spin.

Yeah, I would too. On the other hand, I'm not sure what grade to give
Bob...

Michael

None of the instructors I know would pull such a stunt, but I'd like
to think he was screwing with you. Otherwise that would mean there's
one dangerous glider instructor out there. But you'd think if he was
joking, he'd tell you eventually.

If you find out for sure whether or not he was joking please post.
Either way a new instructor is in order.