You absolutely can! Or, I absolutely can....looks like others here have as well.
Sometimes I round a corner, and find myself flashing back to some traumatic memory - I'm right in it again, at least mentally. If I can't get a handle on it (eg realize what's going on, bring myself back to the present) this can spin me into a panic attack.

I've gotten better at handling them as the years go by. When certain smells or sights, even a slant of the light, trips a memory and sensations, I try to quickly use my dbt to anchor me to the present.

But when stressors pile up, or something unpleasant happens, it can throw me right back to square one.