Yesterday I saw this episode "The One Where Phoebe Runs" from season 6. So Joey is in a box "hiding" from Chandler to surprise him, and when he comes out... apparently the adrenaline of being hiding really got him excited lol
Right after the video ends, Joey said about the Australian girl he's living with "I got all this built up flirting energy and I don't know how to get rid of it!". It's pretty obvious I think.
