The Collaborative International Dictionary of English v.0.48:

Rocket \Rock"et\, v. i. [imp. & p. p. Rocketed; p. pr. & vb.
   n. Rocketing.] (Sporting)
   To rise straight up; said of birds; usually in the present
   participle or as an adjective. [Eng.]
   [1913 Webster]

         An old cock pheasant came rocketing over me. --H. R.
                                                  Haggard.
   [1913 Webster]