Employee: I really like the new floor tiles you picked for the office!
Boss: Good thing, too. These old tiles were put in in the 1950s, and I just found out they were made with cobalt.
Boss: Yeah, they’re actually radioactive.
Boss: A Geiger counter would totally pick up on the radiation in here!
Boss: But it’s not really a problem — it would take decades of exposure to effect you, really.
Employee: I’ve been here 18 years.