Deficiency Memes

The chemistry wordplay here is absolutely brilliant! The doctor tells the patient his body has run out of magnesium (Mg on the periodic table). The patient responds with "0mg" - which looks like "Omg" (Oh my god), but it's actually "zero Mg" (no magnesium left)! It's a perfect double meaning that works on both levels - a shocked reaction AND a literal statement about his magnesium deficiency. Chemistry jokes have such great reactions !