By Sarah Geegan, Robin Roenker
Retired chemistry Professor Jim Holler ended his tenure as one of UK's most popular and celebrated teachers with a bang last December — literally.
On the last day of classes last semester, before officially retiring on Jan. 3, 2012, Holler led his students outside the Chemistry-Physics Building for some learning and fun. The task at hand: seeing how much of a boom they could create while exploding enormous, hydrogen-filled balloons.
It was a suitable salute to Holler’s 35 years at