Cave Story Tribute Site Forums

So, IIRC, there was a passing mention of how the enraged Mimigas once upon a time descended to the surface. My question is: how did they get there? Seems to me that's a long way to fall... And if they just dropped in*, how many died on impact? Did any actually wreak any havoc beyond being a 500 lb dead weight hitting a building at 9,001 miles a second? Was this played out like a game of lemmings?

*: Orbital Drop Shock Bunnies?