You will not believe [funny thing] that [child|pet] did today!
Oh, my goodness. You just will not believe what [child|pet] did today—it was so funny! We were all in the family room, watching television together, and during a commercial break, [child|pet] just started doing the most hilarious thing! At first it looked like they were just doing that one thing that they always do, but then they suddenly and unexpectedly changed it up, startling us all with these new antics! You just had to see it, it really was a riot. I tell you, that's the best thing about having [children|pets], they're so unpredictable. You never know what they're going to do next!