DiamondDust tends to confuse people as it's not baseball related...
I used to be a VERY BIG pro-wrestling fan. The Japanese have very interesting names for pro-wrestling moves. Diamond Dust was one of those names.
A wrestler by the name of Masato Tanaka, who would wrestle state side every now and then, used the manuever. The best way to describe it is picture the victim with his back to the turnbuckles. The person executing the move climbs to the top ropes, grabs the opponent, does a flip off the top rope, and executes the equivalent of a Stone Cold Stunner on the way down. It's a sight to be seen live, and I always loved the name of it... Diamond Dust.
Now, I also use the David Lee Roth excuse. I'm a big fan of early Van Halen, and my first name is David. The only time I'll let anyone refer to me as "Dave" is when they call me "Diamond Dave" in honor of the original "Diamond" David Lee Roth. Hence, DiamondDust fits again.