George Bush Senior has cast his political dynasty into shame after reportedly pissing in the iconic White House fountain.

Bush Senior was in the capital for the annual ex-presidents reunion dinner when he was accidentally served hallucinogenic mushrooms as part of the lavish nine course meal attended by all living ex-presidents of the United States of America.

According to Andy Rattigan, the White House’s head chef, he and his staff “go to extreme lengths” to ensure that the products they use are of the “very highest standard”, this includes “gathering and foraging” fresh mushrooms and truffles, which can sometimes lead to certain “undesirable specimens” finding themselves in White House cuisine.

“Anyone who’s ever spent any time in the White House knows that George Bush Senior loves wild mushrooms,” revealed an anonymous kitchen employee. “Four of the courses we served this year contained wild mushrooms and of the four living ex-presidents it was only George Bush Senior and Bill Clinton who ate them. Clinton was alright but Bush Senior also cleared Jimmy Carter’s and Bush Junior’s plates.”

“It didn’t take long to notice that something wasn’t right with George Senior,” explained the unnamed source. “At first he just started laughing uncontrollably but things soon got a lot more sinister and he started trying to pull up floorboards to find Richard Nixon’s pot stash.”

“Jimmy (Carter) tried to calm him down and told him to pull himself together,” continued the White House employee, “but he just ran out of the room screaming something about Abraham Lincoln’s ghost having sex with Moinica Lewinsky’s sister.”

Bush, the forty first American president, was later seen running through the White House grounds completely naked apart from an American flag draped around his shoulders and a presidential tie tied in Ramboesque fashion around his head.

Security guards finally managed to subdue the former president after he momentarily stopped to relieve himself in the world famous fountain situated on the White House’s North Lawn.

“I’ve never seen an old man piss so much,” claimed the chief of security. “He’d been running around for hours and judging by the colour and smell of his piss he must have been really dehydrated, the water in the fountain was only about two shades lighter than when we dye it green for St. Patrick’s Day.”

Bush Senior was sedated shortly after being apprehended by security and spent the remainder of the evening locked in one of the White House’s many dungeons.

Meanwhile, Bill Clinton is believed to have had a “wonderful night”, which he spent giggling and looking at pictures of previous presidents wives and daughters in White House photo albums.