It happens I talked to a rare Petco employee (rare cause she had real knowledge about snakes) and they had this Sinaloan Milk that got out, got into one of the mouse cages and GORGED itself to a point where it looked stuffed. Best they could tell it ate 5 mice!
She said he laid in one spot for about two weeks when they put him back in the cage. Never regurged or anything but was almost catatonic for a full two weeks.