NAH. Your fight or flight instinct kicked in and unfortunately your brain chose flight. You did not mean to do it and as you said, you did it without thinking or even realising until after it has happened. You have apologised and will probably continue apologising to your wife and there is not much more you can do.

Your wife is right for being upset as it was a stressful situation and it did not go as either one of you imagined however she also did not jump in front of you or follow you when you ran - it sounds like she froze which is also my reaction in a stressful situation which isn't that great either.

Just talk it out, try and find the funny in the situation when the time is right and move on.