Here's soething that seems to happen rather a lot...
http://planetquake.com/sda/misc/duke.dz
Also, he seems to pain rather a lot, maybe a 2 second gap between pains would have made him less of a dancing queen. :-)
Also, he carries a regular gun, except when he pains (and fires?) when he suddenly has a crossbow.
That all sounds a bit negative. On to more positive things: This was a really well concieved and executed episode (ammo shortage in the town aside). The architecture was very nicely realised and often nicely understated. Lovely use of decorative textures.
Gameplay was very good, I especially liked wandering through the three almost identical empty crypts, slowly going round and round and ever upwards and then triggering in the monsters and having to fight your way back again.
I suppose I should download the rebalanced patch now and then try it on nightmare. :-)