broken `this`

function() {
    var me = this,
    writeHead = me.flaker.writeHead,
    write = me.flaker.write,
    contentType = mime.lookup(extname(filePath));
    fs.stat(filePath, function(err, stat) {
        if (err || !stat.isFile()) {
            errback ? errback(err) : me.error(404, 'File not found');
            return;
        }
        // you have to call this:
        me.flaker.writeHead();
        // instead of this:
        writeHead();
        // otherwise `this` inside `writeHead` will break
    });
}