Seat Surfing is the act of hopping from seat to seat to get to a desired area in a Stadium or Arena. This is an alternative to sliding your way to an isle walking down to the row and sliding your way back in.
Mike: Woah! Where did you come from Alex? I called you like 30 seconds ago.
Alex: I was all the way up in row 23 when you called me. I knew it would take forever if I took the isle, so i saved time by Seat Surfing my way down here.