Questions about Double Money Trees

The Double Money question was always a single round 1 question whose position was known to the contestant.

Something I want to know is:
- I've never seen Double Money be on any question other than the $25,000 question. This might have been intentional by the producers (lol doubling $100 after all the hype) but it was never directly stated. Was it ever on a lower value question? If so, is there an episode link?
- Has a contestant ever chosen to jump the Double Money question? I'm wondering what the big-screen animation for that would be.

Edit:
On that note, I've never seen the Crystal Ball lifeline display anything other than $25,000 either. Now I'm wondering if the producers have ever switched the payout values of Shuffle questions behind the scenes while the contestant was there.

1) Yes, double money was once on the $100 question. I don't recall what year it happened but I remember it quite clearly.

2) When contestant jumps the double money question the same animations are played as if they had answered it correctly, doubling the amount lost on that question, just the color scheme on the graphics were changed to reflect the "jumping" action.

Thanks!

EDIT: Hang on, the first clip doesn't look like it was a Double Money question. The contestant gets it right but only the normal animation plays and they get the standard $100 added to their bank.