I think it's called un coup de foudre by the French, which translates loosely to 'struck by lightning'

I've had it happen a few times; it's funny to know that something major has happened but not to understand what it really is. The last time I nearly ran a poor man over as we were staring at each other, except I was in a car and he was crossing the street. Don't know how I'd have explained that to the insurance company ... um, yeah, perving at hot mod cowboy man in nice jeans and hit him