In his haste to get himself to safety, Erevan lets the rope slip through his fingers more than he intended, and the elf starts to fall down. When he almost hits Drum, the nimble rogue manages to get his feet under him, steps once on the wall and once on Drum's head (well, at least Erevan thinks it's the myconid's head) and avoids crashing into his allies. He does, however, fall on the floor in a less-than-elegant, face-down fashion.
"Ouch," he says after a moment, before standing up.