This was present in the early alphas of Hello Neighbor 2, and this was pretty fun using especially in the Beta. The Museum's chimney was actually open in the Beta but for some it got blocked in the full game, please open it back again maybe we can get an achievement if we do it. Maybe it would be, "No Smoking!". In order to do this, you had to drop down a gas canister down the chute of the chimney while the Neighbor was using it. I'm not sure if other locations should get chimneys as well, but they should. (This is some footage of it in the Beta.)
#Return of the Gas Canisters
silk jetty
bold narwhal
Cool
Or maybe you could just throw them directly into the fire
Doing it through the chimney is what would give you the acheivment
solar igloo
The gas canisters r in the files still
U can spawn them in using uet
And if u throw them into the museum fireplace they still explode