Do u smell smoke ???

My colleague sitting next to me said "Do you also smell smoke?"

Me: "yes"

Colleague: Where is it possibly coming from?

Me: May be its the 'Fire in the belly' here", pointing at my stomach.

When he started lifting his finger to cover his nose, did I realize what I had just blurted out.
I had to then clarify that it was another PJ, and no problem with my stomach.