In all of my playthroughs of this game, I have NEVER seen this happen before

Apologies for skipping over the dialogue, this was my fifth full playthrough of this game and I got into a habit of skipping over all textboxes. I was seriously surprised when I saw this happen though, this was my first time seeing this in my many playthroughs of this game. I randomly fell into a sinkhole

Has anyone else seen this? How common is it?