>>2120138 (pb)
looks to me like those tiles are 100mm x 100mm (4" x 4") t. extilerfag
extrapolating from there i get
>pic related
a square opening of 300mm or 12"
almost impossible to 'fall' through an opening of that size IMO
plus it looks like there is an obstruction , on both sides of chute , and the hinge of the door itself , visible on the right side of the picture making the actual opening smaller still
>tl;dr --> fell my ass