I think Coke is the worst thing with actors, they are really keen, lots of passion an energy, and they can't focus to get through their lines. I reacll a bout three years a go working with an actor in to do a guest spot on an episodic sci fi thing i was working on, and he could not get theough a line... We had to piece together his performance with different angles, cudos to the editor, they considered recasting, but the director rallied for him and worked through the problems. Oh and then the lead actress walked off of the riser and took a tumble, blinded by the UV lights used in the scene, they flouresce yoour ineer eye fluid. SHE was and is a trouper, one of the few cast members I am still in some regular contact with. The other non intoxified thespians don't like it either....
We had another female lead who was not so nice on another series, and oh yeah, delays, difficult behaviour, ooutrageous stuff, missing a plane to come back form new york.....screaming for silence....oh it was delightful....Her co star on her last day toally told her off. The crew was absolutley silent.......it was beautiful. :)