A man who managed to make a crank call to Britain’s prime minister says he was “off [his] face on booze and cocaine” at the time. The unnamed jokester was able to make it through to the 10 Downing Street switchboard to get connected to David Cameron’s BlackBerry by claiming to be the British equivalent of the head of the NSA: Government Communications Headquarters Director Robert Hannigan. Cameron quickly detected the caller was not, in fact, Hannigan after he apologized for waking him up at 11 a.m. on Sunday. The merry prankster apparently admitted right away he was a hoax caller, but still bragged about his “adventures” to British newspaper The Sun. “I’ve just made monkeys out of GCHQ,” he rang them up to say right after.