experiment placebo effect going bedroom sister took pillow i two pillows uncomfortable now pillow took extremely comfortable felt lot happier said took pillow back started get grumpy threw pillows floor started mumbling stuff couldnt hear became extremely upset pillow young thought would interesting experiment doesnt think lot stuff changed pillow covers cover hers gave back seemed delighted started blabbering comfortable pillow hurt neck whereas one perfect thought pillow took whereas reality pillow complaining about happily snoring intention ever telling it interesting brain works