What should i of done in this awkward moment?

Ok my name is Brenda and I'm 29 years old. Me and my two friends Jane and Shannon were sitting on a bench outside the local minimart in Baltimore, Maryland. By the way we were all wearing summer clothes, a thin tanktops and short miniskirts. The whole day i had an upset stomach and i really needed to fart. So I lifted my buttcheek and let out a loud monsterous fart. Oh my god Jane and Shannon were in total shock. I realized i forgot to put on my thong that day which was embarassing. Shannon even told me she could see my bare *** when my buttcheek was lifted in a high postion getting ready to fart. I lift my buttcheek in such a high position when i fart. Good thing there was no one else around us. Then about 20 minutes later, I lifted my buttcheek high and proud and let out this loud and wet fart. except it wasn't a fart, it was diahrrea that splattered all over my friend Shannon's tanktop, skirts, and legs and she was so grossed out. She smelt horrible and I felt bad that this happened and I was embarassed out of my mind. What should I of done in this situation? and yes this did really happen