Yeah I don't know if I could crawl into a short one to save my own kid or if I would tell them to wait and call LE, BUT adrenaline would be fueling me and I likely would, and adrenaline was most likely fueling WM as well, and given the fact there are documented cases of people lifting cars because of adrenaline, I can see how in an adrenaline fueled need for self-preservation that he would crawl in... and once inside, he would have been dedicated to getting in and getting out... I do feel he more than likely went in feet first pushing her with his legs to keep an eye on the entrance, and so he wouldnt be face to face with Sherin though... but regardless of how or even who, this is good proof that he COULD have fit and it wouldn't require someone super small to have done this dirty work. Firefighters with equipment can do it, without the fuel of a flight or fight response, I think that means anyone who has everything to lose could do it....