In a classroom two teenage boys clash their heads together whilst the rest of the class watches
Two people bump heads with each other while other people watch.
Two men butt each other's heads in a classroom full of people.
A group of school children together as two young men hit each others heads then they flinch
Two young men stand facing each other then bash their heads together and double over holding their heads
Two young men standing in front of each other hit each other on the forehead then laugh.
A seated boy and a standing boy butt their heads together in front of several people.
Two people hit their heads together and a person laughs.
Two boys in a classroom butt foreheads and then moan in agony.
Two men stood in front of each other and they headbutt each other