In Black Knight, Martin Lawrence plays an amusement park employee who is magically transported back to medieval times and helps return a queen to her rightful throne (while learning some valuable lessons along the way). Despite the script's lack of logic and originality, Lawrence is an engaging performer, with a loose-limbed amiability that makes him most enjoyable company, even if he's not necessarily a better actor than most comedians. If Lawrence ever does a movie with a decent script, he might really have something; as it is we'll have to settle right now for the cheesy yet funny sight of Lawrence teaching a medieval band to play some Sly and Family Stone.