Able to instantly clear medium krugs [GAMEPLAY]

I've been able to recreate this bug in an actual game a couple times on accident. It requires timing and an Area of Effect ability.

1.) Clear large krug normally, causing the spawn sequence of the medium krug 2.) When the medium krugs land and right as their HP bar appears, trigger an AOE ability 3.) IF done correctly both medium krugs will die, regardless of how much damage the AOE ability did 4.) Gain 40 gold and stand there wondering what the hell just happened

So far I've produced this bug with Riven's 3rd Q, Rengar's Empowered W and Lee Sin's E.

With enough practice, this could be reproducible 80-100% of the time