Overheard in the Park

Today Mollie and I couldn't help but overhear an interesting discussion in the park.  Three people, all generally regular-looking, were engaged in what seemed like a sensible conversation about a technical problem.  I'm no engineer, but their use of terminology expressed a level of professional knowledge.  However, as we approached it became clear that they were discussing a prototype for a machine to "attract UFOs".  Mollie and I slowed down so as to more effectively eavesdrop.  Seems like they have a plan that involves magnetic fields that will appeal to extraterrestrials.  I chose not to invade their privacy with a surreptitious cell phone photograph, as this would no doubt only confirm their conspiracy theory about "the watchers", or something.