Tron Legacy Easter Egg - Revenge of the M.c.p.

At the the club (name stated later), as Clu is leaving before it blows sky high, he makes a comment that shoots fear through Cator/Zues,
End Of Line. Not only the name of the club but also the M.C.P's go to line. When it was said in the first TRON it scared the characters included in the conversation.