James Franco badly injured his head whilst filming 'Pineapple Express', his co-star Seth Rogen has revealed.



Rogen, has been reminiscing about the flick to mark the movie's 10th anniversary and sharing some secrets from the set with his 7.6 million Twitter followers.



The 'Superbad' star revealed that Franco only wore a headband as Saul for a scene in the woods because he had suffered a nasty cut, which needed stitching up after running into a tree which had screw through it.



The 'Knocked Up' actor and his co-star Danny McBride also got into a bit of bother on set, the former broke his finger and the latter had his head sliced after Franco hit him, all in the same sequence.



Sounds like a whole lot of misfortune happened on that movie set!