LUKE 22:48

 but Jesus asked him, "Judas, are you betraying the Son of Man with a kiss?" - Luke 22:48

This had to be when Judas "got it."  First, You call him out by the whoever dips in the bowl comment and now You use the Son of Man instead of just saying "Me."  That was intentional, right?  You wanted to make sure he understood that this was just Jesus - some guy, Jesus - a leader, Jesus - a teacher.  You let him know, plain and simple - you are doing this to the Son of Man.

Side note: Did you know that the "Son of Man" refers to a dream that Daniel had where there was a beast that no human could contain, but later he sees into God's throe room and the beast is defeated.  But there are two seats on the throne.  See no human was able to overcome the beast until Jesus did - the Son of Man.  So now, God and humanity were back again ruling from their thrones.

In case you're not getting it.  There is a beast who tries to trick people into thinking their way is better than God's.  And no human could defeat it with human ways.  But, Jesus did not give into the temptation and was able to defeat it by giving up His life.  And that's how we defeat the beast too.  FROM GOOGLE

Other Side Note: In Jesus time, a kiss signified friendship and ACCEPTANCE!  Weird!

No more side notes, just this.  Of all the ways Jesus could have chosen to refer to himself as, He chose to use, "Son of Man."  His main role was to partner with God to bring humanity back to the Father.  I guess that's our main role too.