I go to work the next day (I'm a graduate student in a genetics lab). The pain gets much worse whenever I take a deep breath, so I drop by the student health center. They tell me it's likely just harmless shoulder pain since I've been working out more than usual. I go back to lab, despite my concerns, and get back to science. (But seriously, can we take a moment to appreciate how unlike a real lab this image is? What's with her pipetting technique? Why are those tubes not labeled? Stopper those erlenmeyers!) Anyway....