Are you on some kind of medication? It was a production beset with problems, a change of director (Penny Marshall replacing the jettisoned Howard Zieff) and enough script writers used to fill out a hockey team. So it's unsurprising to find that Jumpin' Jack Flash is a bit muddled, not fully formed as it were. Plot finds Whoopi Goldberg as a computer programmer thrust into a world of espionage when a plea for help appears on her monitor. Cue Whoopi following instructions from a guy claiming to be trapped in Eastern Europe, which of course leads to a number of fun scenes as she bluffs her way…