I once ended up flying around with a balloon stuck to the right wing of my Midwest Super Hots... this happened during a FunFly event at our club.
The goal was to pop balloons that where pinned to the ground on flower sticks. I managed to pull the flower stick out of the ground... it was hanging on the bottom of my wing, and the balloon on top.
I needed quite a bit of rudder at that moment
... if it weren't for the enlarged control surfaces I probably wouldn't have made it back down in one piece.
And more recently (last year) the trim on the right wing of my Weston UK Magnum let go during flight. This is a 170 mph plane... without rudder... and pretty small control surfaces.
The black carbon trim on that plane has about the size of the wing... when it let go it got stuck to the hot tuned pipe... needless to say it was a handful to get it back down. But I made it...