A tour guide recalls the terrifying moment he was swallowed by a hippo and had his arm crushed

• Paul Templer barely survived a hippo attack after a pod capsized his group's canoe when he was 28. 
• He found himself inside a hippo's mouth three times and was swallowed up to his waist twice. 
• Hippos are generally safe if you respect their boundaries, experts say.  

A tour guide has recounted his terrifying experience of surviving a hippo attack that killed his colleague and took his arm when he was 28. 

Paul Templer and three apprentice guides were ferrying tourists around Zimbabwe's Zambezi River in canoes in 1998 when they came across a large pod of hippopotamuses, he told CNN.