| 1 | I thought about that steep stairway. | |
| 2 | The railway slopes up slightly at this point. | |
| 3 | The results: viewers consistently overestimated the slant of each slope by about 20 degrees. | |
| 4 | It was also quite difficult for pedestrians to climb as 16% gradient was more manageable. | |
| 5 | All terrain car able to descend slopes up to 65 degrees. |
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