Belo Horizonte, Brazil: Shortly after coming on as a second-half sub in Argentina's last World Cup warm-up, Lionel Messi doubled over and appeared to vomit on the pitch.
He's done it at least a half-dozen times with Argentina and club team Barcelona, mystifying doctors and fans alike. (In pics: Canine Power Supporting Argentina too!)
"Nerves," says Argentina coach Alejandro Sabella, and that's a diagnosis as good as any. (Also read: Carnival or chaos? FIFA World Cup poised for kick-off)