After the Mass of the Lord's Supper, we remove the Blessed Sacrament from the tabernacle and put it in a different place in the Church, leaving the tabernacle doors open after a procession. This helps us remember that Christ has been arrested and is about to be crucified. As part of this symbolism, our parish left after mass and went from parish to parish in our area to do adoration and "look for Christ" in the blessed sacrament. I thought this was very moving, because we were doing what many of the disciples were doing on the night Christ was arrested. I can imagine Peter and Mark and John, and his Holy Mother looking for him all throughout the night, and just getting fleeting glimpses of him from time to time. Likewise, we could only spend 5-10 minutes in each parish, then had to move on, saying the rosary and praying for each other and our own intentions. Very moving thing!