Ohmygoodness! Guillotines are bad! Good thing it was only your thumb. Yikes, gives me the chills. I don't do so well with blood & stuff, but there was a sick part of me that couldn't stop reading.
Whenever my kids are injured they have to get Daddy's help, because there is a chance Mommy will faint.
(I would NOT make a good nurse!
) In any case, I hope your thumb heals quickly and you can enjoy your Mentor!