Annette, my next video that I just posted has music at the very end just for you my dear. :-*
Allen, I don't have an answer for the bubbles but my guess is too much moisture caused it.
My next video that I just posted has good footage of the multi tool. I hardly use my roto zip any more because of the versatility of this tool. It rocks!
I purchased mine at Harbor Freight. I like the Bosch blades for it.