Revealing mistake: Riggs handcuffs himself to the depressed businessman. They jump off the building but they're not handcuffed to each other anymore. They used plastic cuffs which could separate during the stunt in case anything went wrong. They break just as they jump, so they grab each other's hands to stay in contact. After they land the cuffs are attached again. (00:31:00)
Martin Riggs: Now we both know why I was transferred. Everybody thinks I'm suicidal, in which case, I'm fucked and nobody wants to work with me; or they think I'm faking to draw a psycho pension, in which case I'm fucked and nobody wants to work with me. Basically, I'm fucked.