I've seen several, but this one is by far the best (most obnoxious).
Wahoo Fitness announced the "PLUGGR", Anal Suppository Activity Tracker.
INTRODUCING THE WAHOO FITNESS PLUGGR!MEET THE ULTIMATE BODY TRACKER!
The Wahoo Fitness PLUGGR is the first ever Bluetooth 4.0 enabled suppository motion sensor. It can measure and track your heart rate, motion, body temperature, and digestive regularity.
Features include:
[*]Health metrics sent directly to your smart phone via Bluetooth 4.0 technology.
[*]Measure digestive health by tracking the frequency, severity, and composition of bowel movements. No more dehydration or constipation!
[*]Vibration alerts and electrical stimulus for call, email, and text notification. Reduce the risk of your phone falling in the toilet on bathroom breaks!
[*]Special "race mode" featuring BCU (bowel control unit) for pre-race load lightening and race emergency control response.
Buy the Wahoo PLUGGR today and enjoy full body tracking in a sleek, soft form.