I just got a great email from my friend Kenny Ahern:

HI Mark — I hope all went well for you on Letterman. I am in
Singapore now, no Letterman Show.

However, I have good news for you. Two young guys in my stage crew
think you are a yo-yo god. They were doing some amazing yo-yo moves
between shows and I asked if they knew you. Man, you should have seen
their faces. I instantly became a cool guy because I knew you.

Hope all is going well!