You'd been around a long time, having served in the United States Marines for a long while, and that pretty much showed you all you thought you'd seen

until you went to Japan, and on a walk from a Café, ran into some Zombies...

and from there it was pretty much a spiral, day after day casually shooting Zombies as you go through your day, making it a stress relief for really bad days, until one day

it was a rainy Monady morning, you had just gotten a cup of Joe and were on your way to the park to relax, when another hoard rose from the dirt, and before you could properly get ready to put them back, a long brown haired woman in a Cowboy hat ans a bikini sliced through them, leaving you to watch casually, occasionally shooting stragglers as she went

once she was done she looked to you, confused as you sipped you coffee

Sir, it's not safe to be here you should go before something bad happens to you.