A priority "fall-through" status may be requested for a submission when its creator suspects it is lost in the queue (hence, "fell-through the cracks") and contacts a judge after an unusual amount of time has passed (three months or more). The judge will decide whether or not to directly post the submission to the judging panel, typically for factors such as elapsed wait time and probability of passing.
Verifying each and every fall-through request as legitimate can be difficult, as it involves combing through the entire submission queue. For this reason, mixers who've requested fall-throughs for two submissions which were approved will not be able to request any more. Note: this does not include questions as to the general status of the mix or suggestions and feedback.