Barrel rolls is different variation of the original Barrel rolls (Atom Smasher, Atomic Bomb)
Step 1: First throw strong sleepr
Step 2: Then do an undermount
Step 3: Next bring your hands together and use your index finger to pluck the string closest to you and then roll the yoyo
Step 4: Next take your finger out and repeat the process. Once you get really good, you can do this trick without making it look hard. Finally drop the string and pull the yoyo back to your hand.