You know you're taking your engineering classes too seriously when you look at a street sign and think, "Oh look, a schematic of polysilicon channels on an implanted diffusion substrate!"
Or when you read the words "kibul hadam" in shacharit (korbanot) and think, "Capacitance of the blood? How many picofarads would that be?"
Seriously though, it feels like the first few weeks of yeshiva all over again: meeting a gigantic, diverse yet coherent body of knowledge with which you're barely familiar at first; struggling to reach levels of background and language proficiency which are second nature for everyone else; and finding long textbooks which you know are interesting and useful but which you can't get to because you're so busy with other textbooks. Now, if only I had a good "chavruta" to study with. And a hot mehadrin kosher lunch every day.