God's justice is not always swift or gentle, but it is always certain. This scene is a brutal demonstration of God's judgment unfolding.
Jehu's actions, while brutal, were part of a divinely ordained mission. God had commanded Elijah to anoint Jehu as king specifically to execute judgment upon the house of Ahab for their sins, particularly their idolatry and the shedding of innocent blood (like Naboth's). Ahaziah, by being allied with this wicked family, fell under that same judgment. His attempt to flee was futile; God's judgment, enacted through Jehu, was inescapable.
The details – the chariot, the ascent of Gur, the flight to Megiddo – show the inexorable progression of this judgment. This wasn't just a political power struggle; it was the outworking of God's sovereign decree against rebellion and sin.