Some of those rulz are nuts.About 2 years ago. I use to stop by a model airplane field on the way home from work on fridays an sats. Back when i thought man i wish i could do that, while looking at a pt-40 climbing out. Anyhow to complete your solo at that field you had to pop a baloon taped to the top of a 2 liter soda bottle with your rudder an you had to be at w.o.t. I thought that was kinda crazy. Nedless to say, I have never spun a prop there. I don't think i could do that to this day.