That means if 2 frogs (middle and one outer) jumped, then the weight distribution of the last remaining outer frog would have been too much, therefore tipping the lily pad off balance and throwing the remaining frog into the water. That was the easy explanation.
Medusa first appeared in Fantastic Four #36 (1965), and was created by Stan Lee and Jack Kirby. She appears first in flashback, then in costume as part of the fledgling Frightful Four. She appears in #38, 41, 42, 43, 44-48 and in various subplot glimpses from #49-62. The Inhumans also appear in Fantastic Four # 82-83, with Medusa.
Its muse is not myth but history. The Medusa (or MÃ©duse) was a French naval frigate that boasted 40 guns and fought in the Napoleonic Wars of the early 19th century. Remarkably, the ship survived these maritime battles only to crash on a sandbank in 1816 during an attempt to colonize Senegal.