To feel like a fish out of water, means you feel uncomfortable in a specific situation. When people talk about physics and chemistry I usually feel like a fish out of water because I don’t understand anything, and I mean nothing!
I still think the fax machine is something from the 23rd Century. Honestly, how does it work? I stick some paper in a machine, punch in a few numbers and then someone receives a copy of it in another country. I know it’s cool, but I just can’t get my head around it. Somebody please explain this to me using words with 2 syllables or less.