I took a one month intern position for a company doing data entry. They had thousands of rows in dozens of spreadsheets, and they needed the data entered, row by row, into two different sites, and then link the two entries together.

After the first day I was ready to lose my mind. But... I'm a developer. You know where this is going 😉

At noon the next day, I emailed my employer: "hey, I finished all three spreadsheets you gave me, and I'm ready for more." A few minutes later I received an absolutely astonished phone call.

Long story short, I had all the spreadsheets entered by the end of the day (unfortunately putting the rest of the interns out of a job!), got paid a decent sum for the thousands of $ I saved them, and received a permanent position, where I'm still working today :)