[Sabertooth]

Can I ask a question about this screen name you're using now?

Isn't that a reference to the TV show Seinfeld?
Didn't Kramer, the incorrigible schemer, once pose as a Dr. Martin Von Nostrand?
Isn't that the episode where he played an imposter, and a quack?

I love that show!

[DrMartinVonNostrand]

And can I ask you about the screen name you're using now?

Isn't the sabertooth tiger, now extint, the official fossil of California?