An overwatch fan made a fantastic video showing off an absurd encounter with Sombra in the form of a Pokemon battle. While the video by itself would be pretty funny, the extra editing and work take it to another level.
The Red team seems to be holding the point well and winning the team fights which is probably why the Ana was prompted to go with a hail-mary throw. While looking for the rest of the enemy team to wipe, the Red team Ana looks straight up in the sky and launches a Biotic Grenade. It goes straight up and straight down.
But that's when the magic happens. The grenade lands perfectly on an invisible Sombra, pulling her out of her invisibility. The Sombra is completely confused, and immediately starts firing directly behind her, looking for the Ana who threw the grenade. She can't find her, but now the other team knows she's there. The Roadhog hooks her, and ends the encounter.
The music of a Pokemon encounter is perfect, especially when she first gets hit with the grenade. Just like running into a Pokemon in tall grass. It's unexpected.