The stranger is 'scary' looking. = He looks 'scary'. = He's 'scary' looking.
a 'scary' [='frightening'] movie
(..) Dialogue: Marked=..,Default,NTP,!Effect,Neville, l'm really really sorry about this.\NPetrificus Totalus. Dialogue: Marked=..,Default,NTP,!Effect,You're a little scary sometimes,\Nyou know that? Dialogue: Marked=..,Default,NTP,!Effect,Brilliant, but scary. (..)2001 Harry Potter and the Sorcerer's Stone