A stinky airplane or bus (which is most of them these days) is pretty bad to me. I can handle most stuff others can't, but knowing humans could prevent almost all of that, but choose not to gets me. The worst is a toss up of pulling a decaying calf out of a heifer, which resulted in a tail swish shot of liquid to the mouth, or a house that had tons of dogs and a rather large lady who used 5 gallon buckets and the floors when needing to do their business. I lost my stomach on the decaying calf but I think catching that liquid to the mouth had a lot to do with it.