people have different levels of brain chemicals or whatever the fuck controls mood...
some people go even a few hours without eating carbs and they get headaches and get irritable...and then some people never lose their 'mood' no matter what, im sure we all know people who can go an entire day without eating or sleeping, have a massive hangover and still be upbeat, energetic and happy.
also why did you take the picture down? was it another photoshop like that one you posted where you were 'bigger' than ronnie and for some reason your chests were pressed together?