Celebrity bus tours are lucky to get a glimpse of a famous front yard or two, but an Irish family on vacation last week got an epic surprise when Breaking Bad star Aaron Paul decided to pay their bus a visit.

We’re assuming most celebs hate these tours, what with groups of star-crazy out-of-towners pulling up to your home at all hours of the day with a guide screaming over a loudspeaker in your otherwise quiet neighborhood. But Paul’s reaction when he sees the bus? He runs down the stairs, greets everyone with some friendly small talk, and...