My little boy, who's so far been reasonably happy to be petted, looked at, held by his grandparents and my friends, has just started screaming in horror at them. Not just if they hold him, but if they come close and talk to him as well. He's been fine with the grandparents before, but all of a sudden they're demons! (Although, just to confound us, he sometimes gurgles and laughs at them, but mostly it's the horrors.)
I think I've read about older babies becoming very clingy and afraid of strangers and not-parents for a while, but is this a phase that people are familiar with for this age? Apart from his grandparents being a bit taken aback, it doesn't bode well for eventual babysitting! He's otherwise a reasonably happy little person, I think.