| Name | Age | Sex | Injuries | Injured areas |
|---|---|---|---|---|
| Ewers, Ralph | Not recorded | Male | Hairline ankle fracture | Not recorded |
Over 20 highly experienced cavers spent several weeks making a documentary movie of the exploration of Castleguard Cave in Banff National Park. On the last day of the expedition, a member of the acting/filming team, Ralph Ewers, slipped while traversing the 4000-foot-long First Fissure. He sustained a hairline fracture of his ankle, but was able to get out of the cave without outside help.
Analysis: "The Fissure is tricky traversing and had been made muddier during 3 weeks of filming by the passage of hundreds (literally) of cavers. A number of people fell short distances - Ralph was unlucky to slip awkwardly and "turn" his ankle." (Shawcross)