In a mixing bowl, toss the pork cubes in the oil and ground cumin. Season with a few dashes of salt and pepper.
Place in the base of the slow cooker. Add the garlic, lime juice, and water.
Set on low and cook for 8 hours.
Remove, let cool slightly, then shred with 2 forks.
(Toast the corn tortillas in a warm skillet.)
Boil corn cobs and serve as a side item.
Spoon the carnitas meat over the corn tortilla and top with salsa, diced avocado, and/or sour cream.
Devour.