Finally someone else! I’ve obsessed over the physics for 2 days. Clearly the end of the bottle does not go far enough down the horse mouth to reach where a human mouth could possibly be! We have brainstormed many possible theories:
1. A straw involved (rejected because the tilt back of the head is too far, it would spill).
2. He opens wide and just lets it pour down this throat.
3. A funnel?
4. It is, in fact, a horse under the mask with a snout long enough to reach the beer.
5. He’s faking a drink, and when the camera goes elsewhere pulls off the mask to drink.
Of course I remarked maybe he’s faking drinking the beer at all. Response: “I find it hard to believe someone would spend $8 and not drink it”. Final response: “I can’t believe someone would buy a Cain jersey”.