The suspension bridge effect happens when a person crosses a suspension bridge and he sees someone of the opposite sex. his fear of falling down causes his heart to pound. He then mistakes that for the heart-pounding feeling felt when falling in love with the opposite sex.
In short, when the other party is in a state of fright and he see you, he will fall in love with you.
Psychologically it would work, but probably not in practice
Joyce: Scooter, I love you!
Scooter: Stop shaking the bridge
Joyce: be careful, your gonna fall. your gonna fall!
Ramantha: You know, The "suspension bridge effect" really works! i tried it last time.
Hanna: Yeah! I've heard about that! Thats the way to go about confessing right?
Ramantha: Sure is! How do you think i got Moe to start going out with me?