Coconuts in Ontario? or It's a bird, it's a plane, it's a... squirrel?

Today we went for a walk in the park. As we walked by a large tree, a squirrel suddenly fell out of it and landed - thud - a few feet away from us. When I first heard it, I was disoriented and couldn't figure out what could possible make that large a thud. My first thought was, "But we don't have coconuts in Ontario." Then we saw the squirrel run back up the tree, apparently unharmed. Weird.