Garen Q causes energized attacks to activate early
Bloodlust, RFC, and Statikk all activate the moment you enter range after issuing an attack command with Garen's Q activ, as opposed to when the attack actually occurs.
So you can ready your Q, walk into range and electrocute the minions, but leave without doing the attack.
This bug has been around since at least the introduction of RFC, but I might recall it occuring ever since the juggernaut update.