if Michael Phelps can hold his breath longer under water or taking a bong hit?

He's not a druggie. It was a one time thing that he regrets doing. Luckily the Olympic committee gave him a chance. He does have huge lungs though, so .

How do you know man?

In the paper it said that one of the guys said he "was the champion of bong hits".

We can never know what someone does or does not do unless we are that person. Everyone has secrets.