Boss Office Chairs

Do not panic. Relax and take control.

First role in your chair in a closet / stairwell and toss in a temporary replacement.
Second, go to the toilet and wash as you can. In fact, I keep a change of boxers in my office, just in case. I hope you do too.
Then, use an object to cover the smell perfumed gum, mints, Febreeze if you have any.

Collect yourself, take a deep breath and keep your cool.