Strong magnets are incredibly dangerous; about as dangerous as a table saw I'd say. You can know what you're doing but still get hurt. All it takes is one str

Strong magnets are incredibly dangerous; about as dangerous as a table saw I'd say. You can know what you're doing but still get hurt. All it takes is one stray nail under the table to put a damper on your ability to grab a cup in the future. I bought tiny neodymiums at a store once. They're about 3/4 the size of a dime. You have to pry them off the fridge, they can hang pictures on the wall if a nail is hiding behind, and I _have_ hurt myself with them before. It's easy, and happens before you can blink.