"Oh, this?" Frisk flickers again, "It's just rapid-" another flicker, "fire time traveling. Good time management technique, every two seconds I teleport back in time to camp, slam a potion, then come forward or back in time again depending on the timing to over here to keep patrolling with you." Every few words are punctuated by Frisk flickering again. "Kind of a mental strain, but really handy if I got some punch left in my Melody."