It was only a matter of time.
After J.J. Watt forced a fumble at the Texans one-yard line, ending an obvious Colts scoring possession, the Texans went three and out (which usually happens inside your own endzone).
The Colts reached the five-yard line when Watt dropped Ballard for a three-yard loss and pressured Andrew Luck into an incomplete, setting up a third and goal from the Texans eight-yard line. Offsetting fouls on third down negated a Reggie Wayne touchdown, leading to an incomplete.
Adam Vinatieri converted the field goal, reducing Houston's lead 10-3 with over six minutes remaining.