Just hold onto somthing metal, then squeeze your poopa out.
My story of doing that:
I had to take a REALLY bad stuff. So, I asked to go to use the bathroom as my stomach hurt. So I get to the bathroom and my math partner I was doing work with is asked to come with me and he stands outside the stall. Then, I see the toilet looks like a dump.
So I hold on to the 2 metal bars next to me, and take my stuff. It was a loving nightmare.