Probably no damage as long as the sump still had oil over the pick up. I wouldn't advise ever doing that again! As long as you kept oil pressure no damage was done, if you lost it here and there then it is possible you did quite a bit but I doubt it. If you have trouble checking your oil put a mirror against the garage wall so you can see the window while sitting on the bike. I think that was Bennys trick.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!