Excel/Conversations I have over and over again

Every single conversation I've ever had while working with someone (anyone) and looking at an Excel spreadsheet:

One of us: Wait, what did you just do?

The other of us: I hit this key and that key.

One of us: That works?

The other of us, pointing at screen: Yeah.

One of us: I've never seen that before. I do the same thing but by hitting this key and that key.

The other of us: Really?

One of us: Yeah.

Both of us: *confused stare*