Tricks to Play with your Brain

smashinglists.com

26 points·samratjp··9 comments

Lift your right foot a few inches from the floor and then begin to move it in a clockwise direction. While you’re doing this, use a finger your right index finger to draw a number 6 in the air. Your foot will turn in an anticlockwise direction and there’s nothing you can do about it!

Hmm... this might be overstated. I could do it with a little bit of concentration.

Yes, it's overstated.

To play the piano, for instance, you have to do harder things than that, like playing a 3 against 4 rhythm (left hand plays 3 notes while the right hand plays 4).

I am 30 and was able to hear the 18000Hz tone without a problem (and it's extremely annoying). It's very similar to the sound produced by a CRT that's turned on without video input.

Has the "under-20" presumption been empirically tested?

Same here. I'm 31 and can hear that sound as well.

Is it just me, or are the pictures for #7 and (maybe) #1 a bit NSFW?

Depends on your W, but I'd rather be worried about being caught in front of my desk with ping-pong eyes.

Maybe, maybe not. With respect to the first one... I sleep with earplugs and a sleep mask. I don't hallucinate with these on -- I just don't get woken up by sound or light.

I can see shapes, particularly faces, just by closing my eyes for short periods. I assumed this was normal, e.g. seeing things in clouds, inkblot tests etc. so I think they're just overstating things slightly.

Is #2 an illusory rickroll?

Reply on news.ycombinator.com