Dialog 1 not on your life [ 絶対いや、とんでもない ]

Yukio:Hey since we're in Queenstown, New Zealand, the bungee jumping capital of the world, why don't we try it?!
Angela:Not on your life!! You can't even convince me to jump out of bed!
Yukio:Come on! It'll feel like we're flying!
Angela:I'll go hiking in the beautiful mountains instead. You can go jump off a bridge.

Dialog 2 let someone down [ がっかりさせる ]

Yukio:I just saw the movie "The Plastic Fork 2".
Angela:How was it? The first one was excellent!
Yukio:This one was pretty lame.
Angela:Yeah, movie sequels will usually let you down.