If you can anticipate when you need to clip out a bit:
Give it one or two more solid powerful strokes, then use the split-second coast to unclip safely.
Or if there's no traffic, turn left (perpendicular) to the hill so that you're sort of flat. Unclip on the high side.
-- gnat! (who unclips sooner rather than too late, YMMV)
Windsor: 2010 S-Works Ruby
Pantysgawn: 2011 S-Works Stumpjumper 29er
Whiz!: 2013 S-Works Crux (Singlespeed)
Boucheron: 2009 S-Works Tricross
Haloumi: 2013 Tern P7i
Kraft: 2009 Singlecross
Gouda: 2005 Electra Betty
Roquefort: 1974 Stella SX-73