I second Jenny on that - I too had a cat that got entangled in the handles, and she panicked - after ten minutes of tearing around the house trying to outrun the racket she herself was creating, she burrowed in under the couch and would not come out for anything, even after I removed the offending bag. I now know what abject terror looks like
I honestly thought she would give herself a heart attack.
A suggestion: I put my plastic grocery bags in a little 3qt wastebin in my kitchen/laundry as soon as
they're emptied. Then I nest them one inside another, for disposal of litter clumps. Works like a dream - I can carry the can with me throughout the house for all the boxes, and when I'm done I just tie off the handles and carry it out to the garbage. Lot cheaper than those litter disposal units!!