I took the liberty of rolling your attack roll as well as your damage.
(I’m guessing you were aiming for a non-lethal attack.)
With advantage…
You rolled 2 and 5 (And yes I actually used dice.)
Because this attack hit me (somehow), this would either mean you have a ridiculously high strength stat, or my AC is incredibly low.
For unarmed strikes, you roll a d20 + strength ability score modifier + proficiency to see if you hit.
A ability score of 18 is the highest that a person usually reaches, and adventurers can have scores as high as 20, with monsters and divine beings possibly having scores as high as 30.
Because you are either a monster nor a divine being, lets say you have a score of 18 (+4).
I’m guessing you are currently level 125, which is the current max level cap.
The future maximum level cap has been theorized to be level 1000.
That’s 1/8th of the maximum level, which converted to DnD (5e) would be LEVEL 2.5 (+2).
5 + 4 + 2 = 11.
You rolled a 11 to hit.
Now lets say you did hit me with a 11. That’s bludgeoning damage equal to 1 + your strength modifier!
That’s 5 damage. On a critical hit, you would have done 10 damage.
So, apparently I had so little health that I would’ve had to roll a death saving throw if this was a lethal strike. (which it wasn’t because I was probably rendered unconscious. I was knocked to the floor so harshly that my back might just have fractured a bit so I’m probably unconscious. Also we didn’t roll initiative.)
I was knocked out in by a punch which wasn’t even a critical hit.
5 damage.
That’s all it took to knock me out.