LOL i dont know how it happened. I imagine maybe my pump kept bumping into the site and just warm weather, maybe the adhesive didnt' stick as good, but at least it happened when I got home. Only thing is I was bolusing for what I was about to eat and I have no idea how much I actually got before I lost the site. Pump says it infused 3.9 units, so I'm just going to assume I got that, manually bolused for the rest, and I guess nothing more to do than just check frequently. Worse case, I'll be doing some corrections.