According to International Geographic, he could simply grab one of the many cuttlefish in the whale’s stomach (or tummy) and use that to “saw” his way out through the non-existent blowhole. It’s very similar to the escape in The Poseidon Adventure. I suggest you watch a few more movies before you go around making snotty remarks.
I stopped going to the movies when they began to be full of overly sensitive little pissants with chips on their shoulders..