At the risk of lower the tone further into seriousness I thought the specific double slit experiment referred to was the one where they turn the radiation down so low that individual electrons are going through one at a time, and the interference disapears when you peep to see which slit it goes through. So when you are not peeping it seems individual electrons or going through both slits and interfering with themselves - but only when you are not looking
That's my perhaps flawed recollection in any case