While the mom may have not used great judgement, ahem - put your kid on your lap when deciding to take them on a GIANT slide!? I could see thinking that because your child can sit up (they are obviously in full toddler mode) and can handle the little yellow slide at the park that she's ready for a super slide, (!?!??! *scratching head*) but it's not her ignorance or the stupidity she showed in not letting go of her child's hand that had me getting worked up when I saw this.
Notice the sub title of "I think the dad hit the nail on the head".
He asks afterwards, "why did you even do that?" Like he didn't know they were about to go down the slide? Like he wasn't filming it and anticipating his little one giggling at the end of the ride!? Sorry Buddy, but when you set up your video camera to record something like this you are just as guilty for the goose egg that will inevitably appear. Is posting the video (and leaving that line in at the end) some sort of way to get validation that you're totally trying to avoid any sort of accountability???
