In that second panel I misread my pre drawing and somehow squeezed in another window and then realized, that the cellar windows dont line up. this is of course the only mistake on this page. suddenly ending background drawings, shifting water faucets, disembodied barbera - all part of the great and grand design!
So. Yeah, gabriel drugged them and just threw them and all their stuff out. Barbera is pretty drained at this point due to being soaked. Gabriel actually puts her hand on a piece of cloth on the broken glass in the second grey-rendered panel. I deliberated having a ray of light shine out and the middle panel has a light source hinted at in that direction but i found it too distracting in the end and opted for a black background behind G.
Also for a high security base those windows are pretty soft spots, but Gabriel rarely secures windows, because her lairs rarely have them. Cellars, bunkers, sewage, closets, boiler rooms...