Crazy Chinese smiths. Forge a large flange on the street
Best example of hammer and tongs I have seen. Not familiar with that expression? The Free Dictionary explains:
go at it hammer and tongs
To do something or perform some task with tremendous fervor, determination, energy, or forcefulness. An allusion to the force with which a blacksmith strikes metal using his or her hammer and tongs. What started as a minor disagreement has escalated into a heated argument, and the two have been going at it hammer and tongs ever sinceUpdate December 2017 replaced missing video, reformatted quote.
Update October 2018 replaced missing video, kept old caption.