Aaaahhhh...
The craft of winch driving. A smooth take-up slack. It's quite addictive, and very satisfying to get it right every time. Especially when you had vintage gliders and modern types in the mix - not visible on the wire until they were airborne.
Its fun to watch the novice winch drivers assume everything is a K21 and flinging K6's in to the air like they were paper bags. I saw this happen to the winch-master at my old club, he pulled off as he was going through about 70kts and used ground effect to fly all the way down the field, hop out and give the winch driver a rollicking
He bought the beers that night.