You're at R-85, close to the 2nd Ghost Room, when you hear a bang, but it's not Limbo, it's something else

"A couple of rebounds coming right up!"

You decide to use a safespot, however as it rebounds, the gas it makes is deadly, luckily you got way too many M.I.A.M (Medkits in a Medkit), at the last 3 rebound cycles, it turns blue and begins hurting you more while being SUPER fast, luckily you survived... BARELY