A cat belonging to my SO's family has no tail (rescued her from the pound, no idea what happened to her but she wasn't born like that) and she can't judge a jump at all. She'll try jump up on the table or counter, spend ages building herself up to it and either miss the table completely or faceplant into the cabinets. It is genuinely hilarious and she gets very high and mighty and stalk off if anyone laughs at her.