Forerunner Failure

Well, this morning's run didn't quite go as planned. I blame my Forerunner 305. The batteries must be low or something. It took forever to "locate satellites" and when it did, it asked me "Are You Indoors?" and it was on the YES button and I didn't know how to move it over to the NO side because NO I was NOT indoors, so I did what I always do with technology that challenges me: I grabbed the thing and pushed a bunch of knobs! And knobs there are -- three on one side, two on the other, and two buttons on the face.
It responded. It determined that I was INDOORS and therefore would want LAPS counted, so it started counting laps. But I didn't notice this right away; I saw that it was counting seconds/minutes so I started to run. After 15 minutes I checked to see how far I'd run and that space was empty, totally empty! So I pushed some more buttons and a little "f" showed up. Meanwhile there was a BIG EFF flashing around in my brain..... So I turned it off then on again -- when in doubt, reboot.
Long story short (already too late for that) I ran & walked for about 25 minutes. Am I ever surprised how much it pisses me off that I don't know how far I ran or how fast! Good to know.