Easily, it's keeping it that would be hard. I have the attention span of a Goldfish when someone else is speaking. But ignorance is something I cant stand in anyone else. :-)
Not by clicking their fingers at you one of the management of the company I worked for did it to me one day and luckily he wasn't my manager as I told him if you do that to me again I will rip your fingers off and jam them where the sun don't shine he never did it again :)
By making U jealous... Laughing harder when ur around.... Screaming things out when ur in The same room he room ...
With two parallel orbs.
With courtesy.
I believe a simple "excuse me" would do it.