Things aren't always so serious during TSA airport screenings. When Transportation Security Administration officer Joshua McCall complimented a boy's dance moves as his family was screened at Newark Liberty International Airport, the kid then challenged McCall to a dance-off, reports NJ.com. McCall accepted, and the ensuing video is turning into a hit. For the record, they're doing "the floss," notes the Asbury Park Press. (More TSA stories.)