When the bar patron says: "If I were you I'd stick to the roads and keep off the Moors at night," He is paying homage to the 1981 film "An American werewolf in London." In that film a bar patron gives the exact same warning to the films main characters.
When Davey says, "Do I look like a mechanic?" Clint replies, "Yes!" Davey does bear a strong resemblance to Jason Statham.