Not mine, but I get to run it. We were winding down and were very low on steam. Probably 10-15 psi, and got to noticing the "Smoke" rings of steam coming out of the exhaust.
Steam is so peaceful. We had a 1978 Chev 1 ton once, and it would without fail, blow exhuast rings in the cold. I wish I could make my truck do that.
Lanz Bulldog tractors make terrific smoke rings from their exhaust.
Manuel in Oz