interlocked blocking ... or not?

[whaddayouknow]

My OPINION is that if K1 and K2 were holding hands only as a way to guide each other up field and were not interlocked blocking. I understanding "just prior to" examples would be:
(a) K1 and K2 released hands at contact with R, or
(b) K1 slung/pushed/pulled K2 to privide additional force into R.

... but I have no additional sources to support these opinions. It is only how my mentors have taught me.