Yeah, I swung at it as I was backing out of the cave, which resulted in me missing and a few teeth bouncing off the ground around me, so I bolted.
There is a huge downside though, when I go to tell others about stuff I've done, I have to scroll through three pages of the hydra throwing a hissy fit and beating up random animals, or three pages of one of my re-animated goblin corpses beating everything to death (it got a full title before I did!), making it hard to tell others about the dragon (beheaded with a pickaxe while blocking dragonflame with my shield like a bawss as I rounded a corner... which was kinda anti-climactic, damn dragons are too delicate) or giants or the other hydra I killed later.
Oh yeah! The first dorf who I'm setting up the artifact collection quest with, he apparently had the best title I've ever gotten, Sarvesh "McHammer" Momentmachines, the Poetic Adoration of Steel.
On the subject of the big quest through monsterworld, I screwed up with Nish Babycudgels--the dorf I was going to have follow in McHammer's footsteps--and read the necro tome, forgetting it would make the undead beasties ignore me, so I decided to cut out the temptation there entirely and had her set up a site down by the treehumpers to drop her armor off, and after giving up on getting beards to show up on an elf I settled for naming him Eslome Thelirecilole. Bearded Treeburns, now off to see the world, find some artifacts, kill some beasts, and see if I can pick up a kickass title to finish out the name.