John McAfee is back on Twitter after a couple days of silence - posting the photo above [ link ] along with a wild story of what happened, saying:When asked what he was poisoned with, McAfee responded with:McAfee says he knows who did it - and will get his revenge, saying:There are no other details available at this time.John McAfee is best known for creating the worlds first commercial antivirus software, but left the company he founded in 1994 and has since been involved in mobile apps, alternative medicine, and cryptocurrencies.