Getting the same drink as my friend

Honestly the waiter should have poisoned the first guy's drink, who tf orders "H2O"? Plus, the water we consume isn't pure H2O, there are some minerals in here as well. Pure H2O would require for the staff to specifically go out of their ways to buy some...
(And ladies and gentlemen, here we have the only worse thing than people snickering at scientific jokes, the pumpkin who explains what's wrong with them.)

Johnny was a little boy but Johnny is no more, for what he thought was H2O was H2SO4.