That's coordination and learning to use your momentum. Bruce wasn't strong, he was fast. Punch for punch Bolo would break you in half a lot more easily. Bruce was a legend, to deny that would be pretty stupid, but I really don't think he was so vastly superior to everyone else in the world. My money's been on Jet Li as #1 for years now.
Physique-wise, Bruce wasn't anything special. Shredded, sure, but no amount of leanness can make 135 pounds more than mildly impressive in my mind.
Bruce wasn't strong ? he could do regular push-ups on his thumbs only , he could do one hand push-ups using his thumb and forefinger only , show me one bodybuilder that can do that , you can't , Coleman being probably the strongest bodybuilder up until this point couldn't do that , Lee could hold a 75lb dumbell outstretched paralell with his shoulder for seconds at a time with his elbow locked .
Bruce wasn't strong? you ever see the 1" power punch? he would knock people on their ass and all he needed was 1" , Bruce had functional strenght , he couldn't bench 400lbs but he trained for strenght that served his ultimate purpose to be a better fighter , Bruce at his best was 5'7" 1/2 and weighs 135lbs , he was a bantamweight with the power of a heavyweight , he never had a desire to be big , he always said that the only thing big muscles were good for were for picking up heavy weights .
Bruce had functional real world strenght , his strenght served a purpose which was to make him a more complete fighter , he was extremly fast and extremly strong , and his phsyique was very impressive , especially for a nonbodybuilder , I can't think of another nonbodybuilder who weighs 135lbs and looks that great can you?
And as far as a fighter is concerned I would say Bruce Lee is better than all of his contemporaries , Jet Li is a real martial artist in the sense he was trained in classical martial arts , as was Bruce to an extent , but Bruce realized that with classical martial arts it actually prevents a person from being the absolute best fighter they can be , because most martial arts are limited in thier techniques .
Bruce studied a lot of differant martial arts and took only what he considered the most effective and threw away the rest , he also studied western boxing and other forms of fighting , he is actually the forerunner to Mixed Martial Arts , he used stand-up fighting as well as submissions years before anyone else , he realized in order to be a complete fighter you couldn't limit yourself to one style or one technique .
If you look at the first UFC's and how the Gracie's dominated its only because they knew something others didn't and this is how mixed martial arts evolved and guess what once everyone knew submissions the Gracies started getting beat by strikers , because all they knew were submissions , and then you have guys who know learn , striking , kicking and submissions and you now have a complete fighter , the UFC was the best thing to happen to martial arts , because it really showed what is really effective and what is a waste of time.
I think it was the movie Cradle to the crave where Jet Li was in the octagon with all the UFC fighters and he said these guys would kick his ass in a real fight and I think Bruce would to as well because he trained as a mixed martial artist and had more tools in his arsenal than any other classicaly trained martial artist .