Have you ever….
I was travelling on vacation and wanted to pull up my work email. I was in a hotel and hadn't brought my laptop because I didn’t really want to spend a lot of time with it, and lugging it through customs wasn't going to be fun. So, I logged on at my hotel's workstation and checked my Gmail and my work email through Microsoft Outlook's Web Access.
I closed the browser and made sure that my session ended and I went on with my vacation.
I was at a restaurant and decided to save some data and logged onto the free Wi-Fi they offered. I logged in on my laptop and checked my email and logged into a few websites for work. It made my lunch really productive.