If you stand in room 1x2x1 with one wall of pistons then power and unpower those pistons, you can teleport to other side of piston.
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marcono1234
MC-89530
Piston to teleport
Resolved
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0
marcono1234
migrated
(Unassigned)
Unconfirmed
Minecraft 15w39c
Retrieved
Could you please add screenshots of the setup or explain it a little bit more in detail?