Hal can feel the pain of his soulmate, so when he.wa on a Green Lantern mission with you, a lantern he didn't work with too often, and felt a blow to his shoulder when you got hit, he was suspicious, but it was a battle, so maybe it was his own wound? Regardless, it kept happening, eventually coming to a head after he was off to the side, not getting hit. When you did, he felt the blow to his chest as you did. After the battle, when back on Oa, he approached you from behind to flick your shoulder to test if he felt it, he did

"Huh..."

Hal muttered to himself, leaving you and Kyle standing thare confused