He says that the lights were less than 100 yards apart and that he shifted into the right lane as he approached the light. Where was the highway entrance? At the light?

The OP was travelling at 25mph and the driver pulled into the oncoming traffic lane, passed him (presumably going much faster than 25mph), then pulled back into his lane and still allowed an aware driver enough time to sow and give him room to move into the right lane, pull up to the passer's window and yell at the daughter. All within 8 seconds - the time to travel 100 yards at 25mph.