In "Biblical Perspective" R.E. Trotter writes:

So awe-inspiring was the heavenly vision which John beheld that he fell at the feet of the angelic messenger entrusted with such a revelation, in an unwarranted attitude of worship. It is said that in the Early Church there was a tendency to worship angels, and that this and a similar incident earlier are recorded as warnings to the Church. As the angel deflects attention from himself, he reminds John that he is but a fellow servant with him and with all who have accepted Christ and hold His testimony. The angel then seems to say, in effect, “Keep your worship for God, for He is at the center of all true prophecy.”

Source: Christ, the Triumphant Lord: Adult Teacher's Insights, page 59.