I'm not proud of this code. I should have use asyncjs.

gistfile1.js

app.get('/api/vote', function(req, res, next) {
    ensureAuthenticated(req, res, next, '/publish');
}, function(req, res) {
  var cid = req.query["cid"];
  var u1id = req.user.id; // voter
  
// ASYNC CALL 1, HERE WE GOOOOO!!
  db.findUser({id: u1id}, function(user1Obj) { // get user1 object (mongo)
    var previouslyVoted = false;
    var votes = user1Obj.votes;
    if(votes) {
      if(votes.indexOf(cid) != -1) {
        previouslyVoted = true;
        res.send('ERR 0: User '+u1id+' has already voted on code '+cid);
	    } 
	  }
    if(!previouslyVoted) {
// ASYNC CALL 2, TIME TO GO DEEPER!
	    getSolrCode(cid, function(blah, ret) { // get code object (solr)
		    if(ret) {
  		    console.log('getSolrCode results: '+JSON.stringify(ret));
		      var oldVotes = ret.votes;
		      var u2id = ret.uid; // votee
          
// ASYNC CALL 3, HEEELPPPP MEEEEEEE!!
		      db.upvoteUser(u2id, function() { // upvote user (mongodb)

			      var postData = [ {id:cid, votes:{"set":(ret.votes+1)}} ];
			      var options = {
			        uri: aws + 'update/json?commit=true',
			        method: 'POST',
			        json: postData
			      };
            
// ASYNC CALL 4, OH GOD WHYY????
			      request(options, function (error, response, body) { // upvote code (solr)
			        if (!error && response.statusCode == 200) {

// ASYNC CALL 5, IT'S BEEN AN HONOR SERVING WITH YOU.
				      db.votesUpdateUser(u1id, cid, function() { // add cid to user's votes (mongodb)
				       res.send('Done.');
				      });
			      }
			    });
		    });
	 	   }
	   });
    }
  });
});