No - the one who died during the filming of "Plan 9 From
Outer Space" was Bela Lugosi, who has only a few scenes
in it, including one where he takes a few steps in the
daylight with his cape outspread, then turns around -
this one is used quite a few times. To anyone who's
never scene this movie, I heartily recommend it -
truly bad filmmaking, and a truly hilarious movie that
only gets better the more you watch it.
 
My other pick for a really good BAD movie: The Lonely
Lady, with Pia Zadora. Bless her little heart, she
really tries hard to turn in a great performance here,
but there's no way it could happen - bad acting by
most everyone, wretched dialogue, and you can spot the
bad guys from the minute they first come on scene.
Great acceptance speech at the awards, though!