1. Cook bacon in a large skillet over medium-low heat until crispy. Set aside to a paper towel lined plate to drain until ready to serve. Reserve 2 tablespoons of the bacon grease in the skillet, discarding the rest.
2. Sprinkle pineapple slices generously with chili powder. Cook pineapple over medium/medium-high heat in the skillet with bacon grease for approximately 2 minutes per side, or until pineapple gets slightly golden brown and caramelized. Remove pineapple from skillet and set aside.
3. Mash avocado with a fork in a small bowl with 1/2 of lime juice and a sprinkle of Kosher salt. You want a chunky texture, so don't go crazy. Taste and add remaining lime juice if desired.
4. Cook burgers as desired. Place on buns and top with bacon, spicy pineapple, mashed avocado, and sriracha mayo. Devour immediately, preferably with something cold to drink in hand.

for the Sriracha Mayo

1. Combine all ingredients in a small bowl. Can be made up to a couple days ahead of time and refrigerated until ready to serve.