ok, I'll bite. 'straight blast' works best against someone in retreat. maybe they haven't physically retreated yet, but you can tell by a hesitation that their mind is telling them to retreat. constant forward pressure usually isn't the smartest thing to do, but it works well in order to tip the psychological advantage your way that was starting when the opponent hesitated. why give them a chance to step back and regroup? overwhelm them with a constant forward assault before they have time to get it together. it works, but not when they are ready for it.
the tactic is called 'blitz'. it's not new. it's an oldie but goodie.