”門”在人類文明以來，扮演著不可或缺的重要角色，但在使用經驗上卻始終以手來執行開關或上鎖的動作，如果能從經驗法則上加以突破，一定能大幅解決目前門的使用缺陷。如，以往公廁上完廁所後須先經過一到內門，才能抵達洗手台，但門把上的病菌與髒汙總讓人不願意觸碰，若能以腳來執行上鎖與開門的動作，便可避免手部觸碰到門把而接觸細菌或產生不悅。同樣使用經驗的突破也適用於雙手搬運重物時，人們可以腳來控制門的開關與上鎖，日後更可應用於合適之工作環境空間，讓”門”的角色從歷史中進化與突破。

Even if you wash your hands after using a public toilet, you still have to grab the handle to open the door when you leave. This is where you can pick up all the germs the people before you have left there. Most people find this very disagreeable and unpleasant. This concept focuses on the way the door is opened. You no longer grab the handle, you kick it with your foot, which is a much more hygienic way to leave public toilets. Your hands stay clean.