Everyone can let out a sigh of relief. Following Friday's Christmas scare, a second Nigerian man grounded Northwest Airlines Flight 253 again Sunday morning. Officials say that the man was originally taken into custody upon landing after being verbally disruptive during the flight. Turns out the the businessman simply became sick during the flight and holed himself up in the bathroom for an hour, causing the false alarm. "The investigation shows that this was a non-serious incident and all is clear at this point," said a spokesperson from the FBI.