After installing a few mods that added in small flying mobs (butterflies and birds), I decided it would be a good idea to put my farms in a building to keep my crops from getting trampled. While I was building the structure, however, the game decided it would be a good idea to spawn a bunch of ogres, (added by the same mod as the birds). One promply goes on a rampage, destroying the farm building, so I built a tower to get out of its reach. And there I sat. For two whole (in-game) days. Eventually I got sick of waiting and jumped off the tower. I figured that if I die I can just respawn at my bed and wait for it leave before coming back to gather my stuff from the chest.
I died, of course, since I only had an iron sword and half a set of iron armor. I respawned at my bed, then go downstairs to get some food for my wolf. I could still hear the ogre tearing down my farms -- or, at least, that's what I thought it was doing. What it was actually doing was demolishing the bottom floor of my house. So I went down the ladder, landed on the last remaining bit of floor right before the ogre destroys it, and then fell to my death.
Minecraft, with Mo' Creatures, Doggy Talents, Butterfly Mod, Risugami's Death Chest, and a whole bunch more mods