I was trying to pay attention to my HI during my WILD last night. I came to the realization that HI is even more difficult to remember than full dreams.
I did notice one thing. My HI at the beginning of the night comes in brief flashes. Sometimes they are even too brief to make sense of or notice in time. When I can grab onto one, I find it makes no sense whatsoever. After a WBTB, my HI is much more coherent. Each scene lasts longer, and I find I can understand them and where they came from.