Nobel
Back when SETI science had basically zero funding, the few of us working in the field only did so part time while picking up work with other projects at the Space Sciences Lab. For example my colleague Jeff also acted as system administrator for the Infrared Spatial Interferometer (ISI) project. And when he went on vacation, I covered for him.
One of the main people behind ISI was Nobel laureate Dr. Charles Townes. Much earlier in his career he invented the laser, but at the time of the following he was 92 years old, very active in astrophysics, and still commuting to the lab every day.
So sitting at my desk one morning I got a call from Dr. Townes. Since Jeff was out of town he came to me for help. His e-mail at home wasn't working and he wondered if I could fix it. Sure, but I didn't have my car with me. He offered to give me a ride.
Later that afternoon I met him down by his red Prius and we small chatted as he carted me around various twists and turns through the Berkeley hills to his home. Once there he showed me to his office and I got to work. Long story short after following various cables around underneath his desk and scouring the details of his e-mail client I found I only had to reboot his router and delete/reconfigure his SMTP settings and, voila, he was able to send/receive messages again. Successful, he gave me a ride back to the lab and I got on with my day.
On one hand, I sure got an ego boost helping a Nobel prize winner solve what I thought was a basic problem. On the other hand, the way e-mail works is terribly stupid and confusing and nobody should ever be proud of understanding any aspect of it - I definitely don't judge people who can't be bothered to figure e-mail related issues out and count on people like me to get it sorted. And the solution is usually some form of "turn it off and back on again."
Nevertheless I couldn't help but brag to my siblings later that I helped such a renowned luminary like Dr. Townes. My brother, always putting me in my place, only expressed shock that I willingly got into a car driven by a 92 year old.