Often results in 1) a responding 'Hey' if clear of blame, or 2) pointed silence from the other party if you are guilty of an unknown offence.
Person B: YO WASSUP BRUH, AIN'T HEARD FROM YA IN DIZZAYS. HOW U BEEN MAN.
Person A: Soz man, was just texting the water to make sure you weren't mad at me for throwing up in your pool the other night. Glad we're cool
Person C: Hey
(No reply from Person D).
Additional information - Person C hooked up with Person D's sister and then never called her.