We do? We that's my point. If, in NIST's LS-DYNA model, A2001 is not pushed off its seat, then the focus of AE911T's study on A2001 is misplaced. As was discussed two years ago.However, we agree that A2001 was not pushed off of its seat.
You are claiming to know better than NIST what triggered the cascade of floor collapses by looking at a video simulation. But they have the failure data and you don’t so your assumption is not valid.
The LS-DYNA model shows that A2001 was not walked off its seat. The preliminary report's diagrams shows A2001 did not walk off its seat (Figure 11-36). The final report's says that A2001 DID walk off its seat, but they did not do new simulations showing what the effect would be. NIST never really explained this change. So maybe someone should ask them about that.