Okay. Want the effect of mild hallucinogenics without actually taking any? Look at the picture below and stare at the black dot in the center of the red square for at least 20 seconds. Then cover the red square with your hand and stare at the other black dot.
Seems in her latest video, Katy Perry is trying to out-weird Lady Gaga. Ever try psychedelic drugs, kids? No? Then this video will give you a taste of what hallucinogenics are like: