The trigger scene admittedly hasn't happened yet (there's a thread started for it on the scene I posted, but Anthony-mun hasn't replied yet), but it involves someone under Lyall's protection being injured while in a precarious position and then healed. I don't know yet how badly. There is going to be an echo on Anthony's part too (or it may have already been requested, I didn't check) that I believe gives him some damage resistance or self-repair.

The original scene is part of Biffy's rescue at the end of Blameless. He's been in a prison under the Thames for a few wees, and Lyall and his Alpha rescue him and get him back up to the surface. There's a brief firefight, and Biffy is shot and dying by the time the trouble is over with. Lyall convinces his Alpha to try and turn him to save his life, and the turning works, healing Biffy and making him immortal. The connection is someone under Lyall's protection who he cares about being injured (and of course Lyall is likely to panic and think he's going to die, because he's a biology teacher, not a 300 year old werewolf X3 ), and then healed again.

If that isn't enough of a connection, I'll withdraw the echo request. I just doubt I'm likely to get anything closer to this canon moment :)