Jensen Ackles, <I>Supernatural</i> Jensen Ackles, Supernatural

This, you're gonna love.

But first, here's how it all went down.

At one point during this week's episode of the CW's Supernatural, "Yellow Fever," Dean is waiting for Sam in the Impala. As Sam approaches, he discovers his bro reclined in the front seat with his eyes closed, air-drumming and lip-synching to Survivor's "Eye of the Tiger."

Jared Padalecki's cue to costar Jensen Ackles was to tap on the roof of the car, interrupting Dean's jam session. But for one take, Jared had this thought: What if I didn't give the cue? What would Jensen do?

This video answers that question. Or at least starts to. While this sneak peek will more than entertain you, be prepared to get the entire 90-second version — featuring even more impromptu behavior — as a coda to this week's episode. Supernatural airs Thursdays at 9 pm/ET, on the CW.

Watch the video here, then come back to discuss!