A Clear Command Of Comma Usage By Trygve BergSeptember 3, 2017September 3, 20176th Grade Humanities Photo credit: Sam O’Neill 5 Comma Types That Can Make Or Break A Sentence is a video made by Arika Okrent & Sam O’Neill for Mental Floss. This video explains the usage of commas, and what you are actually saying when they are used incorrectly. Save TweetPinShare0 Shares