maybe f3 or something and counted the difference from the starting block number to the block it landed on, probably done it twice, first counted then remembered the numbers and did it again to show us the speed and how far it goes??
because the cat needed encouragement (twice) seems like grounds for penalization but the iron golem needed no encouragement and was only slightly behind the cat maybe the golem won
This is interesting but this is not a controlled test, so it is not valid. BUT, testing to see how fast they kill for like, making farms, then this is a good reference.