I'm not interested in revealing when but would like to tell someone about what I did. What's the idiomatic time phrase ? Specifically,<br/><br/>[There was once/In the past/Once upon a time...], I caught a 10 pound catfish.<br/><br/>It's true that I could simply say "I caught a 10 pound catfish" but that is a bit dull. <br/><br/>Thanks!