Our Lewmar STs always put three twists in the genoa sheet when the selftailer has feed the sheet. If those twists are not taken out during a tack on our CS one of them will always catch in a turning block, hanging the old sheet at the worst moment.
So in our short (or single) handed tack procedure. the helmsman releases the working sheet, grabs it ahead of the aft turning block, and pulls about 15 feet through his hands, the twists fall off as they go through the hand...then attention can turn to the new sheet.
Certified...in several regards...