On the way to work, the lady sitting next to me was puking on the bus, in a bag. She did not look well.
On the way back from work, a mom with two boys ages ~2 and 4 allowed her two year old to eat apple slices on the metro. He bit off the skin and threw it all around him. She saw and not only did she not pick up the pieces, she just kept giving him more slices as he demanded. Way to go.