I took a step forward to peer into the little chest when the ground gave way...
"OOOOOUUUUUUUUUUUCCCCCCCCCCCCHHHHHHHHHH." I looked up and saw several faces looking down at me.
"Aw, I'm all right, no need to worry - just a few broken bones here and there, nothing vital," I grumbled. Rubbing my hurting backside I took a look around and noticed a small corridor leading northeast - at least I hoped it was northeast and started to crawl...
"Yuck, this must have been an old sewer pipe," I thought and kept on crawling, trying to ignore my fantasies about what had been gushing through here all the centuries. Drawing a tiny firespark rune, I was able to take a glimpse at the stone walls and saw a coat of arms engraved.
Wow! Probably a way to the castle? I crawled backwards as soon as I could and called up to the group:
"Is anyone interested in getting me out of here? I've made an important discovery!"