Go Vacation - Gold Key Hunt - Ball of Painful Memories

I have the instructions here, in case you're interested.

1:45 - Fall 50 Times, make sure you do this as many times as you can. I started at 40.

1:56 - Jumping Off Cliff 1 in the Marine Resort has a cliff that has something like a sword for you to jump off.

3:10 - Jumping Off Cliff 2 in the City Resort is on top of the UFO Building. Jump off the cliff that flashes.

4:15 - Jumping Off Cliff 3 In the Snow Resort is at location 9 in the map. Just jump off that cliff.

5:33 - Submerge any Gear 50 by sinking it into water or Marine Bike on land. I started at 40, but this method is way easy and fast too.

5:58 - Jumping Off Cliff 4 is a really big waterfall and is also the same place where you can easily submerge gear 50 times.