I was sitting outside of Adventure Express 2 years back I think while a couple of nieces rode it 3 or 4 times. The ladder climbing game worker, obviously bored by his lack of customers, started climbing the ladder himself. There were enough people that came thru during this 20-30 minutes that I sat there that it was pretty easy to tell what the ladder game worker was doing that made him successful each time, and what the regular customer was doing causing them to fall each time.
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