Oxygen Debt.

O2 is oxygen , but for some it doesn't even matter! They add another "O" and breathe the O3.

And all what I remember,
          Probably I'm suffocating!

Reviews

[Solar]

These words exercise the mind in the direction of both the external and internal atmosphere.

[Imane Ben]

Yeah, we're shaped mostly of external pressures and internal struggles that bring out the final US. Suffocation has different connotations; as its cause may be of bad ,or good things that we can not relate too much to! Thanks for reading these two lines.