If it feels odd it probably is, if it feels like the driver is aggressive they probably are.

Advantage cyclist: we can quickly and easily turn 180 degrees around and take a look or with a driver with anger management issues pull over and give a very friendly smile and wave "Oh, your"e following me or honking at me because you're my very best friend!" (use all 5 fingers).

Advantage car: massive weight and power.

No brick, interval or training regime is worth your safety. Live to ride another day is what I say.