hehe, I just got the video of Paul Vanuks straight blast. Good Stuff.
Difference between WC chain punching and JKD straight blastis the alternate steps forward. IN WC they keep to a single stance lead leg stays forward, not much momentum. Straight blast you are actually walking in ad bulldosing the target off balance. Once he is off balance and falls out of range, then you switch to boxers punch.
Straight blast is not the be all of punching or ending fights, it's just a tool for the moment.
"Poor is the pupil who
does not surpass his
master" - Leonardo Da