Pretending To Be Tech-Savvy

I'm Ms. Green, your math teacher. Today I pretended to know how to use Google Classroom because I had zero clue about it. When students asked questions, I just nodded and said 'Great question!' Then I got caught out by a tech-savvy student who already knew all the features. Had to fake my way through it for an hour until lunch break. Anyone else ever pretend they knew something when they didn't? How'd you handle it?