from memory these planes are relatively new - so two planes falling out of the sky in a short period of time is a bit of a worry.
these types of accidents (ie falling out of the sky) were only supposed to happen with older Russian planes .
the other day, watso was flicking through the channels and ended up watching a very interesting show about a plane that had a mid air problem . in the end the cockpit of the plane remained attached to the rest of the plane - only because of the flooring