Drink the yellow liquid.

From Thread 1

You take a swig out of the bottle. Suddenly, your mouth burns! You drop the bottle, where it shatters on the desk, and the liquid makes a huge hole where it touched the desk. It's powerful acid!

You stand there in agony for a few seconds, trying to spit it out. However, this is to no avail, and the acid finally dissolves your head.

THE END.