Highway 99

On my way to altoona around holidaysburg
2 12 in head lights followed me doing 80 mph
1 car space behind me for about 2 to 4 minutes..than the lights drifted back and vanish into thin air like smoke
..i watched this with my own eyes..i don't know what to make of it..some of my friends believed me some don't..saying it was a state trooper..NO..i was doing 80 he would have pulled me over..the lights i seen was low like an older sport car and the color was strange soft yellow like glow..just vanished like smoke or fog