It seems to me that an amp cable that pops out when a tug is put on it, e.g., when stepping on the cable, is a *good* thing. It's like a safety breakaway.
But then, my guitar's jack is on the edge rather than the face of the guitar making such a tug a much more direct, straight pull. Just as I experienced this morning when trying to answer the phone with guitar strapped on. ;)
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins
-- Chet Atkins