Singer Josh Groban once received an etiquette lesson from an unlikely mentor - Austrian actor Arnold Schwarzenegger. The You Raise Me Up hitmaker was only 10 years old when his unruly behaviour at a restaurant earned him a scolding from the Terminator star. He says, "I remember literally bumping into Arnold Schwarzenegger. I ran into a restaurant without looking where I was going when I was 10 and this giant arm pulled me back. "It was Arnold and he goes, 'Young man, I'm opening this door for these old ladies. Where are your manners?' I was mortified."