These are people who like to dress up in anthropomorphic (They walk on two legs, like people) animal costumes (https://en.wikipedia.org/wiki/Furry_fandom). In the U.S., people who do this (often at conventions) are called furries. It's considered a subculture, related to other subcultures such as science fiction fans.

'Furry' is a verbal cue to change the direction in which you are facing by 180°. Then, you begin running in a straight line as fast as you can.