I also saw some MALFs (I almost put "a lot", but I have only been to 2 ECQC classes so my experience level is low with the entangled fight and shooting) when folks were "floating" (term stolen from Craig) the gun in an entangled fight. I think that is because of limp wristing/bad grip.
I believe that much of this is because of the stress that performing in ECQC brings on. Just imagine how much more it is in a true fight for life.