Forum:Mechanics gone wrong

So, I was heading towards the Armory and I decided to go take out Ajax - nothing special... Anyways, I get to Ajax and I whip out my Hellfire to Obliterate him and instead of shooting those overpowered fire bullets, The Twisted barrel decided to take over. The bullets spiralled and had no fire effect. I went through two clips and nothing changed. I then cycled through my weapons and then my Hellfire worked normally.

So, my question - What caused this and has anything like this ever happened to you before?