Celebrity·Posted on Apr 30, 2015This Is Robert De Niro Sticking His Thumb Up Zac Efron's ButtThe picture you didn't know you needed today.by Lauren YapalaterBuzzFeed StaffLinkFacebookPinterestTwitterMail *Whistles a happy tune while leisurely walking* *Stop's whistling abruptly and sees something strange in the distance* *Stands still and squints eyes* *GASPS!* *GASPS MORE* The end!