 You should never sneak up to this backroom's entity unless you enjoy getting attacked with acid. The entity in question are called bursters, and they can be found typically on level 3 or levels like it. They almost look humanoid, but they crawl on all fours and have dark wrinkly gray skin, and they smell terrible. Their back legs are longer than their front legs, and they're shaped more like a dog's legs than human legs. Most of the time, these creatures are docile, and they kinda just walk around and chill, but if you sneak up on one and scare it, the calluses and blisters on their backs will burst open and spray a gross, acidic substance all over you. That's where they get the name bursters from, obviously. Anyways, these things were originally thought to be subspecies of the Hound entity, but now we're not so sure. Let me know your theories on this in the comments below.