unorthodox swings

Speaking of Natalie Gulbis, it would be interesting to rank the most unorthodox swings out there. Here are some candidates:

Jim Thorpe
Jim Furyk
Sandy Lyle (post British Open victory)
Arnold Palmer
Natalie Gulbis

I know I'm missing some people, especially from the women's tour. Frankly, compared to the rest, Arnold Palmer may not even fit in this category. Any suggestions?