League of Legends (LoL) Question: Bard's Q into Kayn's E

Basically, when Bard's Q hit someone and have a second collision he stuns the one or two people who got hit, so, my question is. When Kayn is in a wall thanks to his E, does the Bard's Q stun him if he is hit in the wall ? And if Kayn is stun, where does he pops out ? Would he dies stuck in the wall ?