Mr. Shifty Bullet Time Trophy Kill 6 enemies in a single slowmo

In Mr Shifty you have a defending move called slowmo. Slowmo requires you to fill up the bar at the bottom of the screen by defeating multiple enemies in quick succession. Once the bar is full you have one and only one charge of slowmo for thr next time a bullet gets near you. This trophy is for beating 6 or more enemies duringba single slow mo.