Scientific presentations: next time use the mouse!
There is one funny thing about modern scientific presentations. We use PPT or Keynote and have nice looking images, data table, figures and movies. Yet when it comes to pointing out a specific element in a slide, we are given an external tool (external to the presention system) : the laser pointer. When you do that, and in particular if the preson presenting is sightly (or overly) stressed out, interesting things happen:
So for your next presentation learn a new trick: using the mouse or trackpad to “point” directly on the computer screen. It will show on all monitors and no one will be worried about getting a laser beam in their eyes 😉
P.S.: no these laser pointers are not dangerous.