A man is accused of staring at an 18-year-old woman on a Queens-bound G train while pleasuring himself earlier this morning.

Perhaps he forgot that while cell phones don't get service underground, the camera function works just fine. The teen was able to snap this photo (left) before making a run for it.

Cops are currently on the hunt for this man, who was last seen wearing a white jacket, dark pants, a blue knit hat with white trim and a hand (possibly two) down his pants.