After the dance, the Doc is hooking up the powerlines to harness the lightning's energy and a branch falls and disconnects the wire by the clock. In Doc's attempts to repair the situation the plug catches on his pant leg. There are several shots of the Doc's feet as he attempts to reach the plug and it is VERY clear that he is wearing VELCRO SHOES (like the kind you find in discount stores). I don't think Velcro had been invented at this time, not to mention used on shoes.