Cultural events

You went to an art gallery opening with your friend Leo last night. During the main performance, all the lights suddenly went out for about ten seconds and then came back on. Now you are meeting Leo for a coffee. Have a conversation with Leo, speculating about what might have happened and why. Use modals of deduction (must have, might have, could have, can't have) to support your theory, and try to use the contracted forms (must've, might've, could've).