The first time I ever used Bump, I "bumped" in the air (just moved the phone back and forth). It asked me if I wanted to exchange contact info with someone who I had never met; I tried it again and it asked me to accept contact exchange with another unknown person.
All of my attempts since had no effect. Granted, I haven't tried to bump that many times.
My theory is that they use a GPS location to determine where you are. Then when the phone senses a particular type of motion, it considers that a "bump". The server looks to see if anyone else is "bumping" in that GPS location, and, if so, they connect and exchange contact info or whatever.
If this is true, it explains my original success with bumping into strangers: these two people were probably in a nearby house trying to bump! The server thought they were close to my GPS location, and connected me to the stranger.
All of my attempts since had no effect. Granted, I haven't tried to bump that many times.
My theory is that they use a GPS location to determine where you are. Then when the phone senses a particular type of motion, it considers that a "bump". The server looks to see if anyone else is "bumping" in that GPS location, and, if so, they connect and exchange contact info or whatever.
If this is true, it explains my original success with bumping into strangers: these two people were probably in a nearby house trying to bump! The server thought they were close to my GPS location, and connected me to the stranger.