Ben, that is a true story because the Zenit is suffiently simple, engineering-wise, to withstand that 'abuse'. Really, think about it, what could go wrong using the bottom as a hammer?
When I was a child I used to build electrical battery operated gadgets on wooden bases and I had no hammer. Instead of having the intelligence or insight to ask my father or mother to use a hammer to hammer the nails on my contraptions, I used the bottom of an EverReady D cell as a hammer. I used to stip wire with my teeth also, Stupidity has no dearth of places to hide. - David Lyga