Pen caps cause 100 deaths a year.

These deaths occur when people play with pen caps in their mouths and the cap slips in too far, creating a choking hazard. Though it could seem a little far-fetched that so many deaths could be caused annually by choking on such a miscellaneous object, let’s not forget that a choking hazard almost took the life of our 43rd president. 

You might be wondering how there are so many deaths if most pen caps have holes in them. Those holes actually exist to prevent choking and allow a passageway of air. Before most pens began using them, the number of choking deaths was actually higher. Still, most of these deaths are from small children choking, and since toddlers put objects in their mouths to examine them, the pen cap isn’t always the direct culprit. 

(Source)