"Get that fucking butter out of my face!"

Entertainment Weekly explains that Mike Myers is a dick. During the filming of Wayne's World:

Directing her first studio film, Spheeris found herself struggling to prop up Myers' often dark moods. One day, infuriated that there was no margarine for his bagel, only butter, Myers — who, according to several sources, said he suffered from hypoglycemia — stormed off the set. (Myers' rep denies he is hypoglycemic.) "He was emotionally needy and got more difficult as the shoot went along," Spheeris says.
....
To manage Myers' moods, Spheeris put her daughter in charge of making sure he had whatever snack he needed at any given moment: "To this day, I have this image of her sitting on this little cooler, looking at me, like, 'Mom, I f---ing hate you."

Rudeness aside, who prefers margarine over butter? Dick.