Apparently it's yet another creationist ad hoc'ism for how the footprints might have been possible in otherwise impossible circumstances -- giant whirlpools which held back the oceans and left portions of the seafloor unflooded even during a worldwide flood, just to "reconcile" a) fossil footprints that sure looked like they were made on land, and b) their desire to claim the flood was involved...
At some point, isn't it just simpler to throw up your hands and declare, "and then a miracle occurred because we sure can't invent a natural explanation that makes things work like we want it to"?
