Marty posesses many skills.
I learned this by sitting and chatting with Marty as well as observing his interaction with his students during a few Stay-Focused ( www.stay-focused.org) trips.
Marty is one of the nicest people I've met. He has a true calm and good nature that makes his interactions with other people just "smooth". It is also one of many characteristics that accounts for his extraordinary ability to connect with the teenagers in the program, both above and below the surface of the ocean.
Oh yeah, he can make these really cool air-rings.