Experienced streetfighters, like cops and bouncers, avoid going to the ground if at all possible because someone will come out of the crowd and use your melon for a football.
The bad guy has some say in how the fight will proceed, it is probably a good idea to have a plan to solve an entangled engagement and create space to allow other options like your gun or knife etc.
If you can go full out for 1 minute you are a badass.
mike r
