 FAIR: SPOILER: While both Julia and Angiers clone appear to die  very quickly from drowning, there is a noticeable cut during the  scenes which would suggest enough time has passed for them to drown.  This is especially apparent during Julias death because before the  curtain was pulled back, considerable time had passed on Cutters  watch. Also at first she is banging on the glass and then the scene  cuts and she is floating lifelessly showing that a few minutes has  probably passed even though we didnt see it.