Shed flooring safe or not?

I really don't like bumping my own threads, but you guys are the only ones I know who to ask!:P

If walking on the floor makes it bend I would be concerned.  I know I have come down HARD from some moves in the past and I would not want to go flying through floorboards.  Can you access under the shed?  Possibly use one of the supports they sell for instances like this in houses?

Hm.. There's no access to below the shed:/ Lame. Hm, I'll find a nice place for it x.x Damn..