Nice Stranger

My brother and I was driving back from our poker routine tonight at 1:35 am, when we travel down Belt Line, we saw a Civic car driving in our opposite direction and flash his headlight continuously, we was really confuse, what is he trying to do?!?!?? We was in middle of our conversation of what is he trying to said when we saw the cop in front of us.. OHHHH that nice stranger trying to warn us.... although we didn't speed but that still pretty nice... ^__^ so flashing your headlight is a sign to warm people there cop... i learned something new... yay