Coming off an impressive divisional home win over the Vikings, the Packers flew to Ford Field for a Week 2 NFC North showdown with the Detroit Lions.  In the first quarter, Green Bay got the first strike with QB Aaron Rodgers completing a 9-yard TD pass to WR James Jones.  In the second quarter, the Packers increased their lead with Rodgers completing a 2-yard TD pass to WR Donald Driver and a 29-yard TD pass to rookie WR Jordy Nelson.  The Lions would close out the first half with kicker Jason Hanson getting a 38-yard field goal. In the third quarter, Detroit continued to hack away at Green Bay's lead with Hanson nailing a 49-yard and a 53-yard field goal.  The Packers responded with kicker Mason Crosby kicking a 25-yard field goal.  In the fourth quarter, Detroit clawed away at the Pack's lead with QB Jon Kitna completing a 38-yard TD pass to WR Calvin Johnson.  The Lions closed in as Packers punter Derrick Frost's punt was high, causing it to go through the back of his end zone, giving Detroit a safety.  The Lions would take the lead on Kitna's 47-yard TD pass to C. Johnson.  Fortunately, Green Bay rebounded with Crosby's 39-yard field goal, RB Brandon Jackson's 19-yard TD run, CB Charles Woodson's 41-yard interception return for a touchdown, and safety Nick Collins' 42-yard interception return for a touchdown. Aaron Rodgers was voted FedEx Air Player of the Week.
Question: Which team scored a safety, Green bay or Detroit?
Answer: Detroit