It's happened to all of us.
You're reading your comic, or watching a movie, or playing a game, and A Character Appears, pumping your pulse to numbers not recommended by your doctor.
What was it?
I'll offer two:
Superman's return in Kingdom Come comic...
KCSupes.jpg
...and Captain America's shadowy appearance in Avengers. Infinity War film
Avengers-Infinity-War-Teaser-trailer-Captain-America-catch-pointofgeeks.jpg.
To me, what's interesting is that they're both so different, but both scream The Boss Is Back!
Yours?