Seismic waves allow us to make inferences about the properties of the Earth in places we cannot directly sample. In doing so, we depend on our understanding of the in situ elastic properties of rock. One of the goals in The Physical Acoustics Lab is to improve this understanding with laser-based ultrasonic measurements under high pressure and temperature. As we have been developing this technology, many intriguing applications beside rock physics emerged along the way. Part of this presentation will be devoted to some of these applications, including seismology on an apple, photoacoustic medical imaging, and some adventures in the physics of ice.