I was strolling through level 2 after hearing "You smell blood in thy air!" and "You sence a passage to a place beond". Of course the 2nd one means I'm going to find hell's arena, but the 1st one affected the game really weirdly.
It went like this:
1. Go down stairs to level 2, see funny blood message.
2. Kill unusually large ammount of humans, find the stairs to hell's arena behind them.
3. Check out the rest of the map, find even more humans and a few imps.
4. Go back to hell's arena staircase. I find to my surprise the huge amount of blood has turned in to 2 chainguns! Man that makes the cacos in HA a lot easier.
EDIT: Good thing I found them, HA's being a bi*** surrounding me with 4 enemies as I start.
EDIT THE SECOND: Just finished HA, I haven't used a medpack, I have a large medpack thanks to the blood item message, and I just hit level 3 in both distance and XP. Man this game's going well. (This is the last edit, because after this everything will not be related to this and I may as well post my post-mortem.)