It is forbidden to precede Imam in Ruku´ and Sujud

 290. Anas narrated: The Messenger of Allah salla alayhi wa sallam one day led us in prayer, and when he finished he turned his face towards us and said: ´´O people! I am your Imam, so do not precede me in Ruku´ (bowing) and Sujud (prostrations) and in Qiyam (standing) and turning (faces in Taslim), for I see you in front of me and behind me.´´ Then he said: ´´By Him in Whose Hand is the life of Muhammad, if you could see what I seek, you would have laughed little and wept much more.´´ They said: ´´What did you see, O Messenger of Allah?´´ He replied: ´´I saw Jannah and Hell.´´