Cats will fight back when provoked, and kids are just going to do their thing. Put the two together, and the results can be volatile.
But apparently that doesn't stop some people from filming uncomfortable encounters between cats and kids, then posting them to YouTube.
So far as we know, neither kids nor cats were seriously hurt in the making of this compilation -- and we're thankful for that. For the sake of your kids (and your cats), we recommend that you try to settle animal-baby disputes with catnip and sippy cups, rather than fisticuffs.