One plus one equals window. Google it.
only a dozen more likes on the king yo star page before I give away the yoyo used in this video!
I really thought the name would at least elicit a grown, or a facepalm or something 
Lol
nice trick but what is that name? ???
Load the sarcasm cannon…
http://lmgtfy.com/?q=What+is+one+plus+one+equals+window%3F&l=1