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A rail for a marblerun where the marble seams to make small time jumps
The models could be found:
TimeWarp:
https://www.printables.com/model/1485999-time-warp-rail
https://makerworld.com/de/models/2027064-time-warp-rail?from=search#profileId-2185575

Spiral-Tunnel:
https://www.printables.com/model/1489084-spiral-rail
https://makerworld.com/de/models/2025171-spiral-rail#profileId-2183363