I imagine 'cause the heartwarminess of the family reunion means that Goku is dead... Again.
And Bardock too, since he (apparently) survived Frieza blowing up Planet Vegeta.
EDIT: Looking over the rest of the pool, apparently Gine just got done scolding them over killing each other back at the start of DBZ.
Updated
You two are my sons that I'm proud of.For you to be able to grow into a strong man makes me really happy.You were the youngest but look how strong you are now.Hehe...Kakarot.Mom...