Strum Strum Strum. Shake it up baby~! Twist an' shout~! 'No, that chord wasn't quite right.' 'No one'll notice, anyway-' C'mon baby~! '--With all th'screamin' goin' on.' Work it on out~! Yet no playful 'Oooo~!' follows. Only a sharp pain.
George and Paul have stopped playing; by the sound of it, Ringo's stumbled a little on his roll, and something's off with his drumming until he cuts off altogether. John is still strumming away, until after a moment of realization, he stops playing, too. It takes Harrison a moment to realize what's happened. Standing there amid the wall of sound that is their crowd, holding the tips of his fingers to his forehead. The realization comes slowly, as he looks over to Paul, who is doing the same thing. They've knocked heads.
It's come close before, as they both like to lean forward into the microphone a bit too quickly-- but never have they actually collided. That is, until today.
The guitarist can't even manage an 'Alright, Paul?'; instead, he turns to Ringo, and points a finger to the bassist beside him. Once the drummer has finished relaying what happened to John, he gives George a quick nod of affirmation, very barely holding back a laugh.
John lumbers over to assess the situation, and George very briefly explains that he's fine, before tossing in a quip about an emerging headache. They laugh; and then, by his riff, they're back in the song once more.