Vai probably wails on his guitar so hard he probably breaks one per week... so you'd get a week of training... then he'd "borrow" your guitar and break that one in a week... then it's just two dudes on an island... you'll have to take up singing, and banging coconuts togther for percussion...

2 or 3 years later, someone will come by the island, see two guys with long beards and long hair wearing loin cloths, banging coconuts together and chanting things...

then they'll come up to you, and be like "what are you doing here?"
and you'll be all "we've been stranded here for years! woogoobootoo" (you've long since lost your mind)
and they'll be like, "well, why didn't you just go to the airport on the other side of the island?"
and you'll be like "what airport?"
and they'll be like, "you knew you were stranded on the hawaiian islands right?"
and you'll be like "DOH!"