According to Japanese etymological sources, ashimoto o miru comes from the Feudal Age when the palanquin carriers would examine the legs and feet of prospective customers to judge their level of exhaustion, then raise the fare accordingly.
A: Kinoo wa taihen datta yo. Nakagawa to niji made nonjatte sa. Kaeri no takushii ne, ashimoto o mirarechatte, takushiidai, zuibun torareta n da.
A: Last night was a disaster. I ended up drinking with Nakagawa until two in the morning. And of course, the taxi driver took advantage of my condition and overcharged me like crazy.