Some never-before-seen footage has surfaced on YouTube of the moment Kanye West unveiled his 2007 tribute to Jay-Z, 'Big Brother,' to the man himself.

Jay is almost lost for words after hearing the track, and described it as "heavy," before announcing: 'That s**t is emotional!'

"If the camera wasn't going I'd be saying other s**t, but I'll just wait for the camera and tell you later!" Hov adds.

Posted by The Source magazine, the clip is actually from a short film focusing on Kanye's singer/songwriter cousin Tony Williams who has regularly lent his vocals to the rapper's past work.

Williams references Kanye's playback for Jay, recalling it as being "crazy."

Watch Jay-Z's reaction to 'Big Brother' at the 3:50 mark in the video below...

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