Aneros keeps...shooting out?

So, Im not sure if this is another form of super o (as I've had one before) but sometimes when I use my mgx I get into a sort of tug of war with my muscles and itll shoot back and forth from pushing out to pulling back in rapidly (similar to the feeling of a bowel movement but far more pleasurable). But when I let go and let the aneros do its thing my abs flex and my muscles automatically bare down like Im having a bowel movement...however here in lies the problem.

When this is going on and this starts to feel really really good the aneros will often just rocket out and absolutely kill it. Has this happened to anyone else?

And is there a way to rectify this?

Thanks!