That happened to my youngest son in his Jr. Dragster a few years back. He's 13 now, he was 10 at the time. It was his first year in the Intermediate class, which is about 8.90 @ 75 mph which is a pretty good pace for a 10 year old.
I noticed it made a pretty good wiggle about 60 feet out, then went right down and ran fine. I thought that was a little unusual for him, he's always straight down the groove. We got down to the other end to pick him up, and I asked him about the little wiggle.
My son very nonchalantly- "Oh, the steering wheel came off in my hands, and I thought if I could get it back on, I'd be ok. I didn't want to waste the run so I got it to line back up (hexagon fit) and go back on, so it was fine".
Me in partial shock- "OK. #1, don't tell your mom that happened. #2 If that ever happens again,
STOP THE CAR immediately!"
Mom did find out, and to this day she tugs on the steering wheel as part of our pre-run routine.