Screen flash notification of trinket procs.

I'm trying to find a way to have the icon of the trinket sort of flash or appear on the screen, but not stay there for the duration of the buff that the trinket provides. I've seen it somewhere, I believe. Where the icon appears and sort of quickly zooms and dissipates into the camera. But not sure how to get it, myself. I use Weak Auras, but see no way to do it in the way I'm describing.

I use progress bars to keep track of the duration of the buffs I get from trinks, enchants, etc. Which is why I'd prefer for the icon to not stay the duration of the buff. I just need a notification that the trinket has procced. And I want it to be considerably noticeable. Any help is appreciated!