I would NOT recommend eating tacos two nights in a row (my first foray back into eating meat in 8 weeks), in between which taking Senokot (strong version of Colace), and then--after all this--going to an exercise class.
The gas I started having about an hour before the class was horrible, and I had to excuse myself twice from class to go to the bathroom to fart. And when I wasn't there I was consciously repeating in my head, "do not fart, do not fart" like a mantra.
I definitely could have timed that better. Lesson learned. Hopefully one or two of you will avoid similar situations based on my experience.
Re: P.S.A. (pretty gross)