My guess is one nan pulled on door top stayed tight bottom open up 3 to 4 in Then 3 or 4 men pulled the door open Mag have 1400 to 1800 Lbs. hold
Rookie PO pulled the alarm
Pot takers in Nancy office
Gun shot
Glass breaking
There is also video of the Capital cop or cops opening door for the “rioters”, as well as video of them leading the way up the stairs for them.
Pelosi knew about it all in advance, obviously coordinated, and refused extra security from Mil even when warned by the FBI. “Guilty as sin, free as a bird” (for now).