Mug-ception began Sept. 9 on the "The Tonight Show Starring Jimmy Fallon." While visiting Fallon and Fallon's wife, Justin Timberlake discovered a cupboard full of mugs with photos on them.
He found the one with Fallon's face on it and apparently swiped it. Later, Timberlake emailed Fallon a photo of himself holding the mug with the picture of Fallon on it. So Fallon turned that photo into a mug. Then he took a photo of himself holding his new mug and put that photo on a mug.
I'll let them explain.
Here's a picture of Watt holding a mug with a picture of Fallon holding a mug with a picture of Timberlake holding a mug with a picture of Fallon on it.
Watt has not appeared on "The Tonight Show," but it's a possibility next offseason.