Web: bbc.co.uk/5liveTwitter: @bbc5liveFacebook: facebook.com/5live A group of divers trying to take photos of a sperm whale were engulfed in a 30-metre wide bowel movement - otherwise known as a 'poonado'.Keri Wilk was one of the divers caught in the... Web: bbc.co.uk/5liveTwitter: @bbc5liveFacebook: facebook.com/5live A group of divers trying to take photos of a sperm whale were engulfed in a 30-metre wide bowel movement - otherwise known as a 'poonado'.Keri Wilk was one of the divers caught in the attack which took place just off the coast of Dominica in the Caribbean.To make matters worse, Keri "didn't even have a snorkel". He says, "Anytime I would take my head out of the water and breath, some water would drip down in to my mouth."The 'poonado' is thought to be a rarely seen defence mechanism.All images are shown courtesy of Keri Wilk.This clip is originally from 5 live Breakfast on January 23rd 2015.