Arnold Schwarzenegger's 'Expendables 2' co-stars gave him tips on being an action star.

The star took time away from the big screen when he spent eight years as the Governor of California and Arnold revealed the other actors in the new movie - which stars Sylvester Stallone, Bruce Willis and Jason Statham - joked he may not remember what to do.

Speaking at Comic Con, Arnold explained: ''[They said] 'Well, we know you've been out of the business for eight years. Let me show you how to load a gun again and, Arnold, here's how you throw a punch.'''

However, it didn't take him long to get back into the swing of things, joking ''You wish you could do some of those things when you're in politics, but you know, you can't,''

Arnold also poked fun at his own wooden style of acting.

Referring to his time away from the business, he said: ''Some people say Arnold was gone from acting for eight years. Others say he was never in acting in the first place!''

Meanwhile, Sylvester joked he plans to get ''beheaded'' onscreen if they make a third movie in the series to make it even more successful.

He said: ''The more injured I get in a film, the better it does, so hopefully I get beheaded in the next movie.''