Re: Flats. Your feet only really bounce off the pedals when you dont work/move with the bike over the rough stuff. A large, unexpected, square edge hit may do this but you wouldn't believe some of the hits my bike has taken without bucking my feet off.
It's all good though, might as well stick with the clips now that you're all geared up Guest. Before you set off for a ride on a new bike you should have double checked most of the bolts just to see they were all done up nice and tight.
As advised, a track pump is best. Mini pumps are alright for trail side repairs, just to get you rolling again.