You are on the right track. The man is running (it seems to be a race or a time trial) and the woman is slowly walking in front of his path looking in the opposite direction. He doesn’t stop, she gets broadsided in the head (presumably by his chin), hits the ground, and he trips over her.
My only explanation (similar to yours) is that he was so caught up in his race or time trial that he didn’t see what was in front of him. Or if he did, it wasn’t till the last moment, and then it was too late, which has PO parallels.
I laugh every time.
But, at this point, I’d laugh at pretty much anything. All this serious stuff can weight heavily and any comic relief is necessary to remain sane. At least for me. 








