You know the saying about rats fleeing sinking ships?  Yeah, that was actually based on reality.  Rats got on actual water-sailing ships back in the old days.  Don’t ask me.  I don’t know.  When a ship started sinking, the rats would charge up out of the cargo holds, swarming over anything in their path to get away.  Hence the saying.  Even the best security couldn’t keep them out.  Now, the rats are intelligent.  Those buggers can smuggle themselves anywhere.  And have.