Canon question: Tony's armor-in-a-briefcase

[m-steelgrave.livejournal.com]

This question came to mind while in the process of catching up on half a century of canon (yikes): back when Tony was still carting his Iron Man armor in a briefcase, was there ever a time in which danger threatened, but he couldn't reach the case and his armor in time? Because really, Marvel seems to have gone to a lot of trouble to explain HOW the suit fit into the case, but I have yet to come across an instance in which Tony just simply couldn't get to it.