It was just business
The youngling everyone remembers is the snot-nosed Jedi-in-training who asks Master Skywalker what they’re going to do. Instead of answering, Anakin lights up his lightsaber and goes on a killing spree, slaughtering youngling after youngling. Hilarious!
Just so you know, Hayden didn’t actually kill any kids on set. It was all just part of the movie’s story. Later on, Ross Beadman, the snot-nosed kid, met Hayden in a convention in London. Ross revealed that Hayden yelled out “Boo!” to get that look of surprise on his face while filming. Good job, Ani/Hayden. First, you scare an innocent kid witless, then you poke him with your lightsaber.