Again look at the video

Roaches fit almost any small crevice

including underneath a door.

The LMA looking supraglottic device can do the same.

I then inflated the Supraglottic device

and bagged the device.

Surprised even the recorder of this video.

Even he doubted Torres. 

Want to suprise my em resident even more? Just not place the LMA device underneath and pass a shut door. Inflate it and bag thru it with a Bag Mask Valve Manual Resuscitator.
Even he got freaked out with the gush of air sprayed out with my ventilating.