If trees were going to learn to walk, Yellowstone would be a good place to refine the art. Happy seed sprouts and starts growing in the sunshine. A few years later something shifts underground and the nutrient filled water that fed the roots turns to poison. The poor trees, unable to run away, are forced to suck it all up and it kills them quite quickly.
This one obviously managed to thrash around a bit, even if didn't actually get away.
While this one died so fast it is still smiling.
Of course, I could be wrong. Perhaps those green trees in the background did get up and walk away...