If you tilt your head to the right it looks like a happy eyebrow raise
Dia menjatuh ketika kami mendorong dia?
Jatuh (falling) is not something you actively do. So I don't think menjatuh works here. On the other hand though, you can say terjatuh.
Shouldn't push a girl until she falls, the girl can sue all those who pushed her.
Why do we push her?! :/