"I pull my knees up and apart about 5 or 6 inches, then grab that material between and pull..."  Is this appropiate for this forum???????      But on the serious side I recently buried my grab loop under my skirt and it was hard to pop while sitting upright. I remember 20 years ago when grab loops were not so strong but skirts popped alot easier. You could straighten your legs out and push against the rim with your hands and auto eject. Not so with a quality skirt today.