Zombies at home

[tHeArAb]

I don't think it's anything to do with a natural position. It's about extending your arms away from your body in order to make yourself bigger (even doing it subconsciously is deemed to be deliberate). It's bizarre really but I'm pretty sure that's what it is at the moment.

To add to the bizarreness, there is also the 't-shirt line' rule. If it hits the arm on or above the shirt line it's not a pen. If it hits the arm below the shirt line it is a pen. 🙈