Technically this is more a rant than an embarrassing thing, but I just wanted to show my support Seyka!
I actually did something like this the other day. I was trapped talking to a person at my desk, I had given her a lot of time had not challenged her on several ridiculous assertions and tried to end the conversation multiple times. This is pretty familiar territory and I accept a certain amount as part of representing my employer in a good light, but this woman!
So I actually redirected incoming calls to my phone from the main switchboard line just so I could answer a call to get her to go away.
Putting on a headset was the final straw and she left. *Success paw*