What is your favorite interview question or scenario for an Enterprise Customer Success Manager?

My favorite interview question for an Enterprise Customer Success Manager is to ask their favorite failure. It is kind of an oddball question and it teaches me everything about:

• how they think on their feet

• how they learn from mistakes

• how they take accountability

• what they value in their work life

• if they're collaborative and classy

Question:
You've got a brand new Enterprise customer starting tomorrow, $X ARR and X users. (Align the scenario to your business). You're walking home from work and you spot a lamp on the side of the road. You pick it up, rub it and a genie pops out. He says you can have 3 wishes that apply to this new customer and you can ask for anything in the world that you think will make this customer successful with you.

What I'm looking for here:
1) How you handle having things thrown at you that you didn't expect :-)
2) What you focus on, in terms of what you think would lead to success. If you focus on training or product requests, you're not at the level of change management, project management or stakeholder alignment that I need.