He's intimidated so many of his opponents with his trademark punching flurry. Look how Crocop doesn't even flinch and picked him apart. Showed how open Silva leaves himself in his game.
Vanderlei wasn't as controlled as he was in his last fight with CroCop, his fight with Mezger, Rampage, etc.,... looked like he was looking for the quick KO or wanted to end the fight quick. Maybe also believed too much in the idea that constant aggression towards CroCop is a good thing. It wasn't in this recent fight b/c CroCop was ready and waiting for it...
I think his main problem in that fight was not knowing whether Dan was throwing that looping right or if he was shooting. Same problem Fischer had with Franca.