She's never seen him like this. Flashes of it, certainly, and she's smelled the traces of this on him when he comes home from a fight. But to see and smell it happening in front of her is another thing entirely.

He's terrifying. He's glorious.

The battle is most definitely turning against Hal -- and more importantly, turning towards Falstaff's hiding place, which means no time to escape, which means--

He drops to the ground, closes his eyes, lets his jaw go slack, and shams death as hard as he bloody well can. There's no Northern warrior that will waste time on a corpse -- well, he thinks not. He hopes not.