When Tandy approaches Mike wearing the Hazmat suit the first time, you can clearly see inside the helmet that his beard and hair are completely shaved off, but later, they return to their half-shaved state.
Mike referred to his first date with Erica as "hibachi," but it was actually "teppanyaki." Hibachi were originally portable room heaters in ancient Japan. In North America in the 1970s, they were tiny portable cast-iron barbecues that used briquettes. Teppanyaki is a flat open grill, mostly in Japanese restaurants in North America (not in Japan), where meat is grilled together with vegetables and teriyaki sauce in front of the guests' tables.
When milking the cow, Mike coughs up blood but there is no blood on his mouth or tongue.