Hm. I hadn't really thought about Layla as being protected or pure in and of herself. She was buying rock salt at the time. Salt being a protective substance...it dampened the electric current that Scott sent out.

Sorry to harsh on your interpretation.... Uh. I mean. Yeah. Sure! Layla's, y'know, um, "special". Ahem. ;D

No, seriously, I didn't intend for this to be so icky, but Scott was seriously whacked out already when Gordon killed him, and he just...I don't really like his headspace.