ORIGINAL: Helijack
No, don't spool on a hard surface because of ground resonance which can destroy a helicopter.
Ya, I almost found the new "no parking" sign post on the street last week, was right in the southern approach to the oil derrick (simulated). Would have been a mess.
Helicopters have dampeners in the head to help prevent just that. The small rubber stops you put on your skids are also designed to help prevent that.
Ground resonance will happen regardless of the surface you're on as far as my understanding of it goes. Although, it's not a common problem with RC helicopters, and only usually exhibits it's self if your landing gear or mechanics are poorly maintained, or you just got a poorly molded helicopter.