疯狂 insane；frenzied；unbridled；flightiness；folie；

你意识到这声音多么疯狂吗？
Do you realize how insane this sounds?

因此高管薪酬和银行奖金疯狂地增长。
Hence the frenzied increase in top executive pay and bank bonuses.

端起爱情的酒呀疯狂有滋味。
Pick up the wine of love, crazed with taste.

你彻底的疯狂了!
You've gone completely insane!

而且观众为之疯狂.
And the crowd goes insane.