Mellow Mushroom Pizza - If you follow them, they'll probably follow you. Typically, this only refers to when you follow the pizza company online through either Facebook or Twitter. Other times their slogan might be a bit more literal. Seriously - they'll follow you with their giant, yellow, creepy mascot. Below is a compilation of all their literal following.
Follow Mellow Mushroom Pizza and they'll hook you up with free pretzels. They might also give you free pizza for a year. Oh, yeah, they might have their mascot stalk you. In public.
For a more specific example of what Mellow Mushroom Pizza might do when you follow them, check out the video below.