As AA62 says.........Ah, Wedge.
On STS we did some of the early Wedge flights. As usual, the Loadie (Lloyd B) went to the aircraft before anyone else.
When I got there the Wedge, c/w load, had been installed and the a/c refuelled. The fuel load was very light.
Lloyd was sitting on the Flt Deck doing his paperwork and I asked him if he could show me the new fit.
We walked back in the freight bay and, when we got behind the main wheels, the a/c floor started to bounce - the trim was a long way out of limits.
Lloyd said something like 'this is not a good idea, let's go forward again'
AA 62 will, I'm sure, remember the details but after that the rules changed.
It was like walking across a bouncy castle.