... nobody has ever had an internal nose bleed before? I didn't say it was a massive amount of blood. 

or alternatively. The impact of something impaling the mech, punching through the armor, etc. would throw you around a bit, yeah? Therefor, secondary damage from being thrown against harnesses and such inside the cockpit.

Or, tertiaryally (not a real word, I know) A flair for the dramatics!

I mean yeah sure, I can go back and edit it out, but it felt right.