This scene from the movie, "The Path to Power". Hits ya right in the feels if you are familiar with Eighter from the original Dragon Ball and shows a side from Goku we don't really see anymore when he's an adult.
This may be the first time we see the softer side of Vegeta (apart from right before he dies due to Frieza, that is). Cell comes back after Goku sacrifices himself and out of the smoke a beam comes out and kills Trunks. Vegeta realizes what he lost, goes bat-shit crazy, and attacks Cell with everything he has:
Future Trunks finds Gohan dead. This was honestly heart-wrenching. They did a really good job on the music and the voice overs. Young Trunks is all that's left and lost his master. It pushes him over the edge.