Today is known to many Christians as Maundy Thursday or Holy Thursday. Everybody's got a theory on this one but most scholars think that the word maundy comes from the Latin word mandatum, the first word of the statement Jesus made to his disciples as he explained why he washed their feet.
Latin: Mandatum novum do vobis ut diligatis invicem sicut dilexi vos.
Translation: A new commandment I give unto you, That ye love one another; as I have loved you.
Here's more Black Jesus -- Christ washing the feet of the Apostles. Icon of Pskov school (school of late medieval Russian icon and mural painting), 16th century. I suppose this explains why Eastern Europeans and Soviets don't have a problem with images of Black Jesus.
Jesus goes to The Mount of Olives with the disciples to pray, they eventually get ambushed by Judas and the horde he brought with him -- high priests, officers of the temple guard and the elders -- and after betraying him with a kiss (yeesh!) Jesus is taken away to the high priest's house, where his trial begins.
The Bible says that when Peter finally denies Jesus, he runs away and cries uncontrollably. Selah.