<human>: I have a friend who I usually communicated with through a group chat on facebook whose 2-year-old son was just diagnosed with autism (they're not sure how severe or what exact type), and while perusing my reddit feed I saw a greentext story from 4chan, and I love greentext stories.

It was the one about the retarded kid trying to pass through the stopped train, while carrying his bike. The retarded kid gets stuck and tard-howls as the train starts driving away with him. I'm audibly laughing and decide to share it with the group.

My friend, not a minute later says "wtf"

I, not thinking, spout out "yeah well that's tards for ya", remaining oblivious to the fact his son was JUST DIAGNOSED with autism. He decides to log off very shortly after, seeing as it's a pretty sensitive subject for him.

another friend in the group who had laughed at the greentext initially, understood the situation and texted me offline saying basically "dude, we forgot anon's son has autism!"

i felt super bad about it, and have apologized a few times.

Give me the gist of the text in a nutshell
<bot>: shared a greentext tard story with my friend who has an autistic son (which i had forgot about), proceeded to ignorantly blurt out "that's tards for ya",