I know what you're wondering--is there really such a thing as nuclear adhesive tape? According to Captain America # 103 (1968) the answer is: YES! That evil Red Skull places a strip of it on the back of Cap's neck & plans to detonate it! An exact quote: "Just in time. And best of all--he cannot be aware of the deadly nuclear tape upon his neck!"
I'm wearing turtlenecks for the foreseeable future.