will & be going to

[Anonymous]

I think only 'will' work here. Am I right!
One more request! Are these natural everyday expressions? If not, please rephrase them!

1. Don't play with the knife. [You will, You're going to] cut your finger.
2. Don't play on the roof. [You will, You're going to] be injured if you fall down.

Thanks.

[Rusty]

I think only 'will' work here. Am I right!
One more request! Are these natural everyday expressions? If not, please rephrase them!

1. Don't play with the knife. [You will, You're going to] cut your finger.
2. Don't play on the roof. [You will, You're going to] be injured if you fall down.

Thanks.

Both sentences are natural. Will is the right choice.