function (reset) {
      this.currentSpeed = 0;
      this.averageSpeed = 0;
      var chunks = this.chunks;
      if (reset) {
        this.chunks = [];
      }
      each(chunks, function (c) {
        if (c.status() === 'uploading') {
          c.abort();
          this.flowObj.uploadNextChunk();
        }
      }, this);
    }