Thanks for the comments "ladies"!
I'll pass the info on to the 12yo who thinks that the tube removal was the biggest pain that could ever be endured. I don't doubt that it hurt, but he was pre-drugged (as several have suggested) at the same time. I maintain that he is just a wuss who has been trained to greatly fear and panic about the slightest pain in his chest for his 12 years (by his mom). Yes, he has had various serious issues related to his heart, and yes, I am likely less sympathetic about pain than his mom who babies him quite a bit. Then again he hyperventilates and screams to have his twice daily enoxaparin (heparin) injection (unless you tell him to shut it and he can't play PS3 if he doesn't control himself).
I think (not sure) that much of it is attention-seeking. Curiously, the nights that mom was att the hospital he had terrible pain that required medication. The nights that dad stayed at the hospital (and they alternated), he had no pain at all. Very odd.
I guess I have a hard time telling what pain is real and what isn't with this kid, despite being around him for 6 years.