Baltimore Ravens quarterback Joe Flacco winds up on his head as he is sacked in the end zone by Houston Texans linebacker Connor Barwin for a safety.

 
Baltimore Ravens quarterback Joe Flacco winds up on his head as he is sacked in the end zone by Houston Texans linebacker Connor Barwin for a safety.
Baltimore Ravens quarterback Joe Flacco winds up on his head as he is sacked in the end zone by Houston Texans linebacker Connor Barwin (98) for a safety during the first half of their NFL football game in Houston October 21, 2012. REUTERS/Richard Carson