Sometime the squirrels that infest by yard and trees make kamikaze runs across my deck (breeding season or some such thing). I have several times mistaken this bounding/running event as a person walking on the deck. I seen them to this jump, bound, run thing several times and wonder(ed) at how such a small critter can make such a heavy/loud sound on the deck.
I also have a coon that raids my dog and cat food dishes left out on the deck... I believe that coon gets on the rail and dives headfirst into the kibble and water... loudest damn thump ever, generally all I find in my search is a set of fresh wet coon tracks.
