Brilliant...

I had a twattish boss that used to do something similar. He would walk around all day, avoiding any problems / work by 'constantly being on his phone', hence too busy to help anybody.

One day, a chap approached him to ask a question, and was greeted with tthe usual response - as you say, of exaggerated sign language to indicate he couldn't be disturbed as he was in an important call.

With the phone pressed to his ear, and his finger on his lips to 'shush' everyone in the vacinity, his phone started to ring. The shock of this made him drop it.

You'll be quite staggered to hear that he was sacked soon after.
(Mr Twisty Cheeky The worst kept secret in B3ta..., Thu 19 Apr 2012, 8:58, Reply)