Forum:Trap Stun and Chains

I was playing the new World Championship yugioh, Reverse of Acardia. There was a move that confused me, so I'm hoping for some clearifications.

I activated Spirit Barrier and then my opponent chained trap stun to it. Now in the rule book it stated that "Chain Link will rarely have speed spell of 1 unless effects are activated simultaneously" Can someone explain to me how Trap Stun would work in a chain link? Aznskills90214 20:30, May 10, 2010 (UTC)