都倒计时了还不赶快疯
[dōu dăo jì shí le hái bù găn kuài fēng]
Expresses the urgency of seizing time and taking crazy actions before something ends or changes happen. It's encouraging impulsiveness or immediacy of action, perhaps referring also metaphorically to life being short hence urging not delaying to do wild things now while there's still a window of opportunity.