If you go out the front door, there's a little corner to the right, next to the window, that doesn't have any collision, and you can fall through it to get under the base... it's a bug, but it is useful some of the time in case something's managed to fall under the base. Depending on where your kerfur fell, you might hopefully be able to reach them from there, and then you can toss them out the same spot you came in!