Dragon Ball: Yo! The Return of Son-Goku and Friends!

I just watched it again so I could explain which part it was but you know what? I'm not gonna... You'll just have to watch it again yourself and watch out for them. A lady is pushing a pram that looks more like a shopping trolly and there are 3 little babies wearing white nekomimi... Then mummy looks up then everything goes boom! That's all I'm gonna say....