How we change what others think, feel, believe and do
Give some excuse and leave.
This does not have to be valid or even particularly sensible. Just saying that you must go is
Giving a reason often helps, although again it does not have to make sense.
Excuse me, but I have to go now.
I have to get off now. Is that ok?
I must leave because I have to go now.
People give excuses all the time. It is a social ritual that demands acquiescence from the other person. To refuse a simple excuse request is itself considered much ruder than excusing yourself.
When giving a reason, all you need to do is to sound rational. Research by Ellen Langer on pushing into queues (for using a photocopier in the experiment) showed if you give a reason, then people are more likely to let you in. What was most curious was that even when the reason did not make sense, it still worked.
And the big