that's drummer charlie watts. >> i'm not a musician of that caliber. indescribable. he looked like a french gangster style. he had the voice and resonance. >> charlie watts for whatever reason just jumped off the screen. what was that? >> i think charlie watts still jumps off the screen. at their finest, when mick is doing his roaster strut and keith is standing there propped up by some force of anti-nature with a cigarette dangling from his mouth and to see charlie just kind of grinning and say there goes the kids again, his expression is priceless. >> don't be deceived. the film is much more than charlie. from the moody, messy brian jones. >> you're not the same person. >> to the surprisingly self-aware jagger. >> you're acting. you're doing an act. it's not really you. >> "charlie is my darling" shows a band teetering on the brink of international rock and roll stardom and struggling to figure out what it all means. >> jagger's ego, i mean he has said this himself, was one of the things that powered the rolling stones. and turned them into the jugge

. >> that's drummer charlie watts. >> i can't read. maybe it's an inferiority complex. ed like a french gangster star. he had the voice and the resume and everything. >> reporter: andrew says charlie watts for whatever reason just jumped off the screen. why was that? >> i think charlie watts still jumps off the screen. at their finest when mick is doing his rooster strut and keith is standing there propped up by some sort of anti nature with a cigarette dangling to see charlie grinning there goes the kids again his expression is priceless. >> reporter: don't be deceived though. the film is much more than charlie. >> the future as a rolling stone is very uncertain. >> reporter: from the moody, messy brian jones. >> you're not the same person on stage as you are the rest of the time. >> reporter: to the surprisingly self-aware jagger. >> you're acting. you're doing an act. it's not really you. >> reporter: "charlie is my darling" shows a band teetering on the brink of international rock 'n' roll stardom and struggling to find out what it all means. >> jagger's ego, he has

watt. >> reporter: darcy mcquiggin and little charlie are on their way to the park.s because he's feeling what she's feeling. >> he can tell if i'm in a sad mood. i'll get a little lick on the cheek or something like that. >> reporter: when you yawn, your dog yawns. swedish scientists, here they are at work, just proved that dogs actually empathize. and that's why they find human yawns contagious. >> not just yawn, but they also took on the emotion that yawning usually signifies, which is usually sleepiness and thirdness. >> reporter: and it works, well, 69% of the time. yawning is also contagious between humans and chimpanzees, baboons, and budgerigars, but not between us and tortoises. yep, someone actually looked into that. oh, and cats couldn't care less if you're tired. but will a dog yawn more for its owner? our swedish scientists say no. i say yes, because when i tried -- [ dog barking ] and when melissa, the owner tried -- there you go. nick watt, abc news, los angeles. >> and thank you so much for watching. we're always here at abcnews.com, of course. "night