Ok so heres the deal. I drop my worker off at a stop with 5 lawns to do, while I head out to do a couple estimates and 2 lawns on the other side of town. I drop him off, don't hear anything from him. I am coming back and the lawns look great. I stop for a second to see hows he doing and ask him what I should do. He then goes ahead to tell me that the oil dip stick "came off" (27hp kohler), as it was sitting on the stem but not in the correct "pushed down" position. It was "spitting oil all over the place", on the muffler, air filter canister, etc. I ask him how he found out that the oil dip stick was not in correctly and he tells me that he could smell something burning, and it happened to be oil on the exhaust when he stopped. He pushed the dip stick back down and kept mowing. So I go ahead and take a look, there is oil on the air filter cansiter and some parts around. I pull the dip stick and notice it is bent, then I notice that the stem that the dip stick sits in is also slightly bent towards the throttle linkage. I ask him if he hit anything/swing get stuck in there and he said no he didn't hit anything and what I found the most odd was that nothing around the dip stick stem was bent. All is like it is supposed to be, but my oil dip stick and stem were bent in, towards the throttle linkage. I bent it back by hand and it is fine now... The only thing I can think of is that he was backing into a tree and a branch pushed the dip stick stem and bent it inwards, bending the dip stick and spitting oil on the exhaust/air filter. Is this realistic? Anybody have this happen to them?