Thanks everyone...that's what I was kinda thinking but wanted to make sure.
As for why do I need it for just a couple of nuts/bolts. I need this for the big stuck nuts. The scooter has had a couple so far...the flywheel nuts and axle nuts. They are on so tight...on parts that spin...that an impact is the best way to break them free. Same thing for the bigger bolts on my truck frame/bed that will need to be freed up.
Good note about the letting the compressor rest. Hadn't thought of that before. My little baby must be pretty good...she handled the roofing gun I used to shingle my whole roof...and the partial patch I put on a friend's deck.
Today I have to go find a 23mm impact socket...sheesh going to have a fully stocked mechanics garage soon...:^)