Sidebar on his Wikipedia page:
"(Hank Aaron told me) 'Don't dig in against Bob Gibson, he'll knock you down. He'd knock down his own grandmother if she dared to challenge him. Don't stare at him, don't smile at him, don't talk to him. He doesn't like it. If you happen to hit a home run, don't run too slow, don't run too fast. If you happen to want to celebrate, get in the tunnel first. And if he hits you, don't charge the mound, because he's a Gold Glove boxer.' I'm like, 'Damn, what about my 17-game hitting streak?' That was the night it ended."
—
Dusty Baker[82]
Same source: "Gibson was surly and brusque even with his teammates. When his catcher Tim McCarver went to the mound for a conference, Gibson brushed him off, saying "The only thing you know about pitching is that it's hard to hit."