This is a wonderful photo of an example of guru devotion. Recently, when His Holiness the Dalai Lama walked into the room to give a teaching, everyone bowed down to him. Notice Khandro-la, the living dakini who has healed many beings, bowing even lower than lower to His Holiness. This is how we venerate the Buddha, His Holiness who is the embodiment of 1000-Armed Chenrezig. This is respect. This is how we venerate our gurus, who are greater than the Buddhas of the past, present and future.
I remember my guru, Lama Zopa Rinpoche, who would simply refuse to sit side by side with His Holiness, his guru, even when His Holiness asked him to. Rinpoche mentioned before, it was not right to be sitting on the same level as your precious guru. He would rather invite any other person or visitor, take his seat than sit on the very seat which is on the same level as his guru. Previously, His Holiness had a private meeting with Lama Zopa Rinpoche and a few other students in a room. His Holiness sat on a chair and asked everyone to sit down on the chairs. Lama Zopa Rinpoche immediately dropped to the floor with his head not far from the floor. His Holiness joked with Rinpoche but just could not get Rinpoche up to sit on the chair. Lama Zopa Rinpoche chose to sit himself on the floor, bending his head very low almost touching the floor, in the presence of His Holiness. This is how I learned guru devotion from my guru.