Mom: "Hey Bobby, can you take your little brother outside and play with him and the remote control car? He wants to play!"
Older kid: "Sure Mom! I made ramps and everything for that car! I'm sure it'll be fun!................. C'mon little brother... Stand right in front of that ramp and get a good view of how high this thing can go!"
What do you think is going to happen? If you read this blog enough, I'm sure it's not too hard to figure out. [Or if you read the title of the video... Not to give anything away, though.]
The answer to your question: Yes, it is in fact completely okay to laugh at this.
So a little kid got hurt, that's sad. But a little RC car TOOK HIM OUT! He got TACKLED by a car the size of his shin. Can you imagine that happening to you? Everyone would laugh then, too. [Maybe that makes it less funny.. Hmm.. Imagine it's YOUR little brother or friend. Yesss..]
Now pick on someone your own size, car! I mean... Big brother.