Azkend 2: The World Beneath

WARNING THIS ACHIEVEMENT IS PRETTY LUCK BASED!
Never fear SnapDragon is here and has found an easier method.

Recommended level: 11-1 (the background of this level happens to be the achievement picture)
This level will give you several opportunies to zap a bug mid-flight.

Recommended setup:
Camera and Sub Electrics these will keep your tesla coils regularly charged near full capacity ready to zap one of those "little yellow bastards" when it starts flying.
Edit: No longer necessary but it helps to weaken bugs faster.

So the general idea is that you want to weaken the bugs in the centre down to one hit, the bugs on the far left and far right don't matter as they always crawl up their respective sides. But it can be useful to just kill them off quickly as your charged tesla coils always target the farthest bug along, and you don't want them getting in your way.

Once weak you must wait for a bug to get into a space where they cannot travel any further forward. (Without flying)
At this point you must be in a position where you can

Either
(MUCH EASIER METHOD DISCOVERED BY SnapDragon) make a match with enough tiles touching the bug to kill it, but hold the match and wait for it to start flight, confirm the match then watch as it is almost instantly struck down from the sky.
Boom! Achievement Unlocked!

(Video courtesy of SnapDragon)
Note this is not level 11-1 but the idea is the same.


Or
(my shitty luck based original method that I'll just leave here for archiving purposes)
unleash the tesla coils charge by holding down a move that will generate a charge, the camera is great for this, combined with a compass piece even better. I would recommend either having 3, preferably 4 coils already charged because an extra charge coming in can make a split second of difference and screw you out of the achievement.

Now the horrible luck based part, you cannot tell which bug is about to move or when, all you know is that multiple bugs can't move at the same time, to make matters worse if you recognise a bug is just lifting off the game is too slow and making the match will zap the bug after he lands.
So it basically comes down to setting up as best you can and then praying that when you time your release of the match that the bug you want to hit starts flying just when sparks do to.

This level is nice though because you usually get a few attempts at it before having to restart, and once you get the sense of timing down the luck will eventually fall your way and boom achievement unlocked!

Anything I may have missed or any other suggestions, write a comment and I'll be sure to add it.