those are not to high

[CarloSsS]

I came across the following sentence. A non-native speaker uttered it so I'm unsure of its correctness.

I enjoy jumping out of windows, providing those are not situated too high.

Is the use of "those" here natural? I would use "they" instead of "those". What do you think?

 

[5jj]

I agree with you. 'Those' is not natural.