How could I make this drop down floor in Hammer?

[regal isle]

use a func_door_rotating for the floor and set a trigger or timer to open the door when a player is in trigger volume for more than a minute or how ever long or short you want

[thorn sparrow]

it has to be a phys prop though
for punting to work

[sturdy fractal]

i figured it out

heres the video again since i tried to delete the post, but only deleted the video

heres a vid of how i did it, for those interested

[spark parcel]

very cool idea man