Take a 2.5 lb. tri-tip roast and rub it with some meat rub seasoning. I found this all natural rub in our local grocery store and it ended up being really tasty. Be careful not to rub too much on the meat, as the seasoning can overpower everything. Put the meat fat-side-up in the crock pot and add 12 oz. of chilled Coca-Cola Classic. Pour most of the Coke around the meat, but do pour a little over the top. Cook on low for 8 hours.
After the 8 hours is up, remove the meat from the slow cooker. It should look something like this and fall apart really easily. :9