Healing as a medic on 2Fort Instaspawn 3H round. The red team were all very, very good indeed, and they had Braincancer playing Demoknight (He's the one who designed the Persian Persuader). I charge up an uber and go for it with the lone player left alive near me. A Huntsman Sniper. He charges straight into their defenses, cuts down three of them with a kukri, then headshots the heavy coming to get us with his Brass Beast. When the uber runs out, we back down into the sewers, charge up another Ubercharge, then head back out into the main playing field.
Sniper takes out a level 3 sentry gun with only a bow and arrow, then as my ubercharge runs out, that same Brass Beast Heavy runs straight past me.
I pull out my Ubersaw, dance around him, and slice him to ribbons with it. He gets maybe a few hits in, dropping me to 45 / 150hp.
Want to know the best thing about the Ubersaw?
25% slower firing speed, in exchange for 25% Ubercharge bar gained on hit. It took me five hits to kill Mr Brass Beast Heavy, by which time the Huntsman Sniper was heading back to camp.
A Scout on our team came out, dropped down to where I was, and I activated my newly charged up Ubercharge AGAIN. That's three ubercharges in two and a half minutes.
Scout rips holes in the oncoming team, sniper helping us all the way with his huntsman, and we manage to completely break their defense and they scatter like bowling pins.
We cap three times in the next few minutes, bringing our score up even.
One particularly memorable bit was waiting in a small room with a pyro for an enemy to pick up our intel, and I was taunting with the ubersaw (Slow attack animation, if it connects, OHKO + 100% ubercharge filled up)
I had only just got in place and done the first few frames of the animation when a Demoman ran in and promptly got impaled on my ubersaw.
It was glorious.
"Great heals, Medic. You did good, man".