I quaff ID stuff when I'm in a dangerous situation also. It's a good strategy. Strength, invisibility, beserk, agility, curing, healing, swiftness, lignification, all can help bail you out, and I probably forgot one. Half that many kill you but you're in a tough spot anyway right?
I've done it before too, and it's not like he could do anything else in that situation, it's just that he should have bailed out before getting down to 2hp in front of a full health kobold. Only invisibility, healing and swiftness (to run away) and maybe berserk could reliably get him out of that situation, since he was one hit away from death.
Of course, I also play fast and loose on level 1 of the dungeon, so I was being a bit cheeky.
Re: end of the Let's play
Orc:4 could have ended badly, like, 7 times. If it weren't for the spoilers, I would have thought that was the end of it.
EDIT: Why didn't you use bat form, by the way? I'm thinking about video 21.
Other notable quotes:
"Could I please confuse you?"
"These orcs can't see invisible: they are STUPID!" (self-satisfied)
"Stop trying to learn things, orc!"
"All these people are gonna die horrible deaths... MERCIFUL deaths, I meant to say."
"Hehehe, down to Abyss 5!"