JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css">
<script src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
<div id="newAlarm" tabindex="-1" role="dialog" aria-labelledby="modalLabel" aria-hidden="false" class="modal hide fade in" style="display: block;">
              <div class="modal-header">
                <button type="button" data-dismiss="modal" aria-hidden="true" class="close">×</button>
                <h3 id="modalLabel">New Alarm</h3>
              </div>
              <div class="modal-body girlLookAtThatBody">
                  <input type="hidden" name="alarm[_id]">
                  <input type="hidden" name="_method" value="POST">
                  <div class="row-fluid">
                    <div class="span6">
                      <div class="control-group">
                        <label for="name">Name</label>
                        <div class="controls">
                          <input id="name" name="alarm[name]" class="span12">
                        </div>
                      </div>
                    </div>
                    <div class="span6">
                      <div class="control-group">
                        <label for="description">Description</label>
                        <div class="controls">
                          <input id="description" name="alarm[description]" class="span12">
                        </div>
                      </div>
                    </div>
                  </div>
                  <div class="row-fluid">
                    <div class="span4">
                      <div class="control-group">
                        <label for="series">Triggers when value of</label>
                        <div class="controls clearfix">
                          <select id="series" name="alarm[alarm[series]]" class="span12 pull-left">
                            <option...

CSS

.girlLookAtThatBody{
    
    overflow-y:inherit !important;
}