I'll admit I don't know much, but I know how to throw punches and keep my distance. Groundfighting my knowledge extends enough to keep me from getting choked out or put in an armbar.
Ima get you on the ground and choke you out while your in an armbar. No, in seriousness, your comment is pretty fail: realife non organised fighting involves the heavier guy winning, 99.9% of the time, reguardless of anything else, unless one party has trained in intense military or paramilitary combat. Unless you get in a judochop. No, serious; the oldschool, "joke", judochop with side of hand or arm to the neck disables anyone not wearing serious protective gear. So, know some stuff, try to throw a punch, judochop will destroy ur neck and arm muscles, you will soon learn not to "keep my distance". No one believes it untill they have seen it, but short of palmspear to the nose, oldskool judochop is simplest and fastest way to reduce anyone to deadweight.
EDIT: Forgot the "nutsacking". Grabandtwist or elbow to the groin, and work it! Noone fights back when you grab their sack and tell them to whistle dixie.