Transcript
A: Hey, Heather. Do you have a pen I could borrow?
Heather: Yep.
A: Cool. This is a very, very, mysterious fact, actually. You can rub the pen cap on your jeans, and watch: you can make it almost magnetic. Watch. Let me see if I can do this. Pull it back. Look, it attracts. Watch. Then demagnetize it. Here. Try it out. [pause] Maybe next time.
Hey, guys. Here’s the explanation for the magnetic pen cap. For this next trick, I usually say that it’s static electricity. You’re going to need one of those pens, the Bic pens, with the clear barrel and the blue cap with the rounded edge. Very important, because what you need to do is, you need to squeeze the pen cap between your first finger and thumb so it looks like it’s actually attracted back to the pen, so basically it shoots right back. Just like that. You can also do it right-side up, and you can also do it upside-down, so it looks like it defies gravity. That’s the definition for the magnetic pen cap.
