- First the fuel source would need to be kept at -160C or so, which is difficult, and would be decidedly impressive upon failure.
- Second, one of the reaction products is HF gas. If this doesn't mean anything to you, note that HF gas was the -first- substance covered in the "Things I won't work with" category. "And that soaks into tissue very readily, with the acid part doing its damage along the way, and the fluoride merrily poisoning enzymes and wreaking havoc."