I've gotten two balls in three days stuck on top of a building (school). Its summer time so it's all closed up. The structure itself is 20-30 feet high, and is flat roofed. They're stuck in the gutter that runs all the way around the place but its so big even a heavy rain won't knock them down. I need a scheme to get these balls and the ones I hit up there in the future...

Anyone got one?

I was going to tie the hose that's sitting by into a coil and lasso them down, but it turned out to weight like 40+ kilos so thats out.

This is my kind of mind game

Thanks