Sonar raft

Sonar wakes up and starts flying around the house because Sonar woke up and the refrigerator was open. For example, the text says that someone open the refrigerator. Another example, they left the refrigerator open so Sonar got out of the refrigerator. A third example, is that someone woke Sonar up. Clearly, Sonar wakes up and starts flying around the house because Sonar woke up and the refrigerator was open.