This Reddit thread from r/AskReddit asks users to share a Reddit post or comment that they can't get over. The thread is filled with humorous, heartwarming, and sometimes disturbing anecdotes from Reddit's history. Users recall a wide range of experiences, including a redditor whose life was saved by a comment about carbon monoxide levels, a post about a man who ate an entire sandwich meant for a party, and even a comment about a dog struggling with mindfulness. The stories highlight the vast diversity of experiences shared on Reddit, from life-saving advice to deeply emotional accounts.