Trains and busses

I travel a lot in trains and busses to go from home to work and back and most of the time during rush hour. This is not a bad thing most of the time. But imagine an overloaded bus. Two men get in the bus and immediately a dirty smell rises, like those two people haven't showered for weeks. Everyone started covering their noses and where getting nauseous. Every one wanted to get as far from those people as they could but there was no possibility as the bus was very crowded. This was really a discusting experience.