Very happy with this shot. Lighting and timing just as I'd like. Balloon was placed to accentuate roundness. Very much like the non-obvious reason for burst. Some post-processing in PS to touch up some areas.
From my second shoot with my new digital sound trigger. A bit more thought to composition and lighting this time round.
Strobist: SB800 on camera left, SB600 behind subject with plexiglass diffusor. Flashes on 1/64th power.
Update: EXPLORED #5 thanks guys!