Brought to you by the words:
"Smelly" and "Stopping".
First, smelly people. Not smelly as in "I have no air conditioning and weight 300 pounds"-smelly, but "I have no sense of smell and don't know that a whole bottle of aftershave/perfume is a little too much"-smelly.
Second, "stopping" as in, I like to race up the escalator and then suddenly stop half way up so everybody behind me gets bump into each other.
Gotta love it.
14 minutes ago