I've added a bootstrap tooltip, however, sometimes (and only sometimes) when I hover over the image to show the tooltip, the image just flashes without actually showing the tooltip, like so:



Here's my HTML:

&lt;div class="up"&gt;&lt;/div&gt;
&lt;div class="down"&gt;&lt;/div&gt;


JQuery:

&lt;script src="assets/js/jquery.js"&gt;&lt;/script&gt;
&lt;script src="assets/js/bootstrap-tooltip.js"&gt;&lt;/script&gt;
&lt;script type="text/javascript"&gt;
  $('.up').tooltip({title: '&lt;b&gt;Up&lt;/b&gt;', delay: { show: 500, hide: 0 }, trigger: 'hover', html: true});
  $('.down').tooltip({title: '&lt;b&gt;Down&lt;/b&gt;', delay: { show: 500, hide: 0 }, trigger: 'hover', html: true});
&lt;/script&gt;


What's wrong?


Question: How did Superman play the "disappearing" game as a kid?
Answer: The canon quote from the film transcript is 


  "We used to play this game at school. I never was very good at it!".


I think it's pretty clear that he's referring to 'hide and seek' rather than his newfound ability to make himself appear in multiple locations since that would have obviously have raised a very considerable number of questions. Furthermore, it's very likely that he's being ironic since his x-ray vision must have given him an incomparable advantage against his schoolmates.

In the original shooting script the line is slightly different; 


  "How do you like these odds, General ? Or are they too odd for you?"


closely followed by 


  "One more mistake like that and you'll be busted to Corporal, Zod.