This aspect is going to vary dramatically depending on the setting. Here is one example:
You get flashes of insight into events in the present or future. These psychic flashes hurt like migranes, are often hard to interpret and tend to leave you rather shaken.
- 'Remember' something relevant from a previous flash.
- Gain an advantage performing a task that could be helped by intuitive leaps.
- Have a vision strike at an inconvenient moment.
- Show you unwanted or uncomfortable truths