Underestimate an arm-bag

You pick up what looks like a handbag from the side, but you recognize it from one of the rougher pegging videos. The man had had his arms stuffed into it and was then easily pushed around by the woman with the strapon. Conveniently laying next to it is a large sleek black rubber dildo with a suction cup at the base.

Feeling a bit risky, you think that since you´re more flexible than the man in the video you should easily be able to get out of the arm-bag. You first put the dildo standing up and then slip the armbags straps over your shoulders. It almost feels like a backpack! You then slide, with some effort, one arm into it and then the next. Instead of realizing you´d just caught yourself, you then squat down over the dildo. You feel its thick rubbery head press against your ass, you´re starting to have second thoughts as you press gently down. However, seems like you´re not meant for that.

One of your feet had been standing on a strap which slid away under your feet, making you fall right down on the dildo. you cried out as nearly the whole dildo was showed up your ass to fast. Your ass feels completely stuffed and you try to get your arms out to lift yourself up. But you can´t! You wiggle and wiggle but you can´t seem to get your arms out of the bag! As the realization that you trapped yourself sinks in, you sink down fully on your moms dildo, feeling its rubbery base meek your cheeks.

You´ve got to get out of this, but how! You´ve still got your feet so you could probably call someone with some effort, but who?