Interesting graphic. I thought that Z was mostly on the grass, with his head hitting the concrete - but perhaps that isn’t the point of the graphic. And probably doesn’t matter.
What I wonder if it has been, or will be, brought up is the construction of the buildings and location of landscaping with respect to Martin being close to the buildings to get out of the rain. Were the eaves large enough and the landscaping so few that he could walk near them in an attempt to stay dry.
And if he was worried about getting wet, and only wanting to get back to his place to watch the game - why would he double back away from where he was staying?