Customer: We wanna add this thing to that feature. It has to go live with the next deployment (1 1/2 weeks to go)
Me estimating developmenttime, and informing the Management
management: this will take approx. 12h to implement, but we need these informations: [long list of not answered questions]

1 week later (1/2 week left till deployment
customer: okay, lets do it
management: we dont have much time left, what about the questions i sent you?

1 Day no response, 1 1/2 days left until deployment

customer: here you have a few answers. couldnt get the others. ill Send them tomorrow

damn... wtf? guys! i need this shit to Stay in time! cant wait another day! hell no!