And going on a little farther he fell on his face and prayed,
“My Father, if it be possible, let this chalice pass from me,
nevertheless, not as I will but as thou will.” Matthew (26:39)

Many passages of the Gospel show Jesus at prayer, in many different locations, this is the only passage that has Jesus praying prostrate. Many passages have other people coming to Jesus and falling prostrate before Him.  The prayer of Jesus at Gethsemane is perhaps one of the most important that Jesus prays (it is the start of The Passion), and the posture of Jesus praying face down to the ground teaches us something special. It shows what so many people of the Old Testament did when praying for/about something very important, they prayed prostrate, with their face to the ground.