Smart Logic Riddle

Smart Logic Riddle Solution - 4 June

A sea diver is a real show off.
He showed everyone that he can hold his breath under water for 15 minutes.

I went to the diver and told him that i can be under water for double the time i.e 30 minutes.
He responded that he will give me 1000$, if i would be able to do it.

I won the 1000$.

what did i do ?

Update Your Answers at : Click Here

I filled a glass full of water and held it over my head for 30 minutes.