Fitness feud
It wasn't just Arnie who couldn't put the dumbbells down!
Carl Weathers - who played Colonel George Dillon - took on the daily routine of his 'Rocky' character Apollo Creed for 'Predator', and would go out of his way to work out every day he was on set.
In fact, the late actor was locked in a rivalry with his co-star Arnie to see who could get the best physique, and so he would get up as early as 3am to get his workouts in.