Missed Opportunities

Thursday I missed the Homeless Shelter Discussion and a grand chance to see an explosion :-(

Today I didn't hear my phone ring and missed a chance to talk with someone that I very much wanted to talk with. Why do cell phones sometimes catch an incoming call and sometimes not?

EDIT: someone needs to teach me how to pinpoint my hyperlinks. Explosion didn't go to Thursday April 15th to see the story. Good read though and I totally agree with Chuck.