This is a type of "slug bug" game that has been popular in Finland for some time now. It is just simply called Yellow Car. When you see a yellow car, you punch someone in the arm and yell "Yellow car!". The rules are the same as in the others.
Yellow Car game was made popular by a Finnish internet comedy video, where two boys are playing it. The game ends up violent.
A link to said video, in Finnish: www.youtube.com/watch?v=k9FPgPuhU-w