I'm surprised that everyone was making puzzle 51 look so difficult... I only lured the single top red around a corner...went up and sealed it off...then grabbed that bomb... On the way back down...get the one near the flashing blue...hit the button leave the way you came then go after the targets... The green bugger will protect you from the reds all the way up to the chest... It took me less than 10 seconds to solve it... When I first saw it...I was thinking...nah...it can't be THAT easy... Guess I was wrong...