IMO an even more interesting situation is when a pebble is stuck in a tire tread.
Let’s say a car has a speed of 60 MPH and a pebble is stuck in a tire tread. When the pebble is at the 12:00 position (highest point), the pebble has a speed of 120 MPH relative to the road. When the pebble is at the 6:00 position (lowest point), the pebble has a speed of 0 MPH relative to the road. When the pebble returns to the 12:00 position, the pebble has a speed of 120 MPH relative to the road. And so on.