This is nonsense. It was a part taken from a drama series which
there previous episode shows how he learnt skills from Bruce
(Without his knowledge) then used it against bruce. It was later he
felt very guilty and .........
PS: I believe before he is "invincible", he has defeated by a
lot of gangsters and such before he has fully trained and
experienced enough to be that.
It is taken from the legend of bruce lee show.
It is a real story. The part about Ed Parker learning skills
from Bruce and than use it against Bruce is fake.
But in real life both of them did fight and Ed Parker defeated
Bruce