Serve on tortillas with sour cream, guacamole, beans and rice, salsa, cilantro, or whatever you like.
Put pork shoulder in slow cooker with beer. Cook on low for five hours or more, until pork falls apart when poked.
Shred meat, mix together with spices, and spread in a thin layer on a shallow pan. Broil for a few minutes until meat is slightly crisped.
Serve on tortillas with whatever additions you like.