Fireman's bicycle.
https://s3-us-west-1.amazonaws.com/h...ns_bicycle.jpg
Previously:
https://www.homemadetools.net/forum/...168#post126187
https://www.homemadetools.net/forum/...183#post134668
https://www.homemadetools.net/forum/...646#post104908
https://www.homemadetools.net/forum/...834#post119274
https://www.homemadetools.net/forum/...8421#post87491
https://www.homemadetools.net/forum/...395#post122132
https://www.homemadetools.net/forum/...718#post108237
https://www.homemadetools.net/forum/...610#post128369