On Strava, some of the smaller segments have bad elevation data. For instance, this bridge over the Ohio is at most a 50 foot climb, probably closer to 40 feet total. But it shows the lower elevation as 196 feet, which is almost 300 feet below the river water level. So the leaders show VAMs of 6000 to 8000. That's funny.

Here's another segment with bad elevations. It's 80-90 feet, not 337 feet.