http://connect.garmin.com/modern/activity/499974466
That is a track of a transatlantic flight. The speed-graph is completely off, and so is the timing section. Essentially, max speed can not be lower than average speed.
I made the track with a Fenix 2, and I guess stuff like this could be a major issue if the bug is in the watch, and someone actually uses this for the jump-master functionality.
Timing
Time: 12:37:52
Moving Time: 12:10:17
Elapsed Time: 14:14:56
Avg Speed: 818,4 km/h
Avg Moving Speed: 849,4 km/h
Max Speed: 191,1 km/h