Maybe an alternative formatting?

```js
app.media.initiateCall(
  this.callee, this.local,

  function onSuccess(pc, localVideo) {
    this.local = localVideo;
    this.pc = pc;
    this.$('.btn-initiate').addClass('disabled');
    this.$('.btn-hangup').removeClass('disabled');
  }.bind(this),

  function onError(err) {
    // XXX Better error handling required
    app.utils.log(err);
    app.utils.notifyUI('Unable to initiate call');
  }
);
```