In Massas case it would've missed both the top and centre bar.
https://www.google.co.uk/url?sa=i&rc...35464529818398
You can see from any front view of the halo that there's actually still a lot of space for an object to get through. But there are concepts that solve that too -
https://www.motorsport.com/f1/news/f...672256/672256/
I'd just like to see a full solution.