The OP goes to twitter that has a link to the comments section of an article about a similar problem with a Copenhagen Suborbitals rocket. (It' also a interesting article, with videos.)
I think the link should be changed the specific comment:
Summary: Nitrocellulose (gun cotton) doesn't need oxygen to explode but it turns out that it doesn't work in a vacuum. We only found this out in 2013. A Rosetta scientist saw the Wired article and sent a comment in April 2014.