I was flying a .35 powered Monoline plane which came in at me... that wire.. I believe it was .060", tried to wrap itself around me.. Would have been a serious situation had the thing not crashed about 1/2 way round.
With most 1/2A Monolines the line going slack was no big deal, you still had control.
A Ringmaster I was flying back in '56 just plain stopped flying at the top of a wingover.. dropped almost straight down.
Never could finger out the cause of that.
And at the '62 Nats in Chicago, at a pit stop with my FAI team racer, the lines snagged on a piece of grass about 20 feet away.. I fuelled the plane, started it, released it.. and it whipped around in a 360 around the grass, then pulled free as it came to the usual flight direction, and kept on going. I yelled to John Barr who was also flying then... "That's the way we do it on the East Coast!".. Came in second behind John.