There are plenty of smart bike locks that warn you about thieves, and some will even let you share your bike if youre the generous sort. However, their utility often stops when you start riding — which is where Velo Labs new Skylock comes in. The security system compares its own motion sensor data with that of your smartphone to tell if youve been in an accident. If you tumble off and dont respond within a set time frame, Skylock will alert emergency services that youre in trouble.