Prison cell

In some of the Metal Gear Solid games Snake gets himself caught and ends up in a Prison Cell guarded by Johnny Sasaki.

Metal Gear Solid
by crawling under the bed johnny will open the door to look for Snake. Crawl out again and knock him out.

Metal Gear Solid 3
There are a couple of methods that will work here.
 * 1) The door uses a radio frequency lock so a radio call to it's frequency will open it.
 * 2) Throw the food back to johnny, after the third time there will be a cutscene where the frequency can be found.
 * 3) use the fake death pill johnny will come in to see if you're dead.
 * 4) spinning Snake around in the cure screen will cause him to puke, johnny will come in to check Snake out.

you can also trigger the Guy Savage minigame while in the cell.