"Unfortunately for Raspberry Pi 2 owners who are trying to photograph
their devices, ... the Raspberry Pi 2 has been found to be Xenon flash
sensitive. Any camera with a Xenon flash aimed at the device is
causing the device to freeze for a few seconds before rebooting."
-- source: http://it.slashdot.org/story/15/02/08/0643254
Peter Reutemann, Dept. of Computer Science, University of Waikato, NZ
Ph. +64 (7) 858-5174