I had a whole job interview while in the crapper. Needed to take the call, it was important otherwise i woulda crapped my pants, suddenly the phone rang.
At my old workplace a guy was on the can taking a dump whilst on the phone to his fiancé. Another guy I worked with poked his camera phone through the missing air vent on the bottom of the door and took a pic of the guy on the throne with a strained expression as he talked to his missus.
Needless to say, copies went up around the building
I answer everytime (thats gonna make a few people on here that call me concerned)
If its someone important, say your boss, or someone offering you an interview, then you just keep as quiet as poss....dont let rip at inappropriate points of the conversation! I usually find myself texting whilst in there anyway, and sometimes even make a point of putting my phone on vibrate just in case!
On the other hand..if its someone who is offering you a credit card, Loan, new mobile, or something which you DO NOT want, then all the above goes out the window
But why not put it on vibrate whilst going about your business? Dont want it suddenly ringing mid-flow, and scaring the crap out of you (no pun intended)