Nine consecutive strikes but gutters both attempts in the 10th frame?

Answer 1

This is probably the most disappointing way to bowl a 240 game.

It's not far outside the realm of possibility. Before my brother bowled the first of his six 300 games, he had a game where he got the first 10 strikes. He was so nervous on his next shot that he threw it in the gutter. He picked up the spare for a 280 game.