I dig this idea! Quickly whipped up this macro:
Set Variable ‘Front Window Name’ to Text ‘%WindowName%1%’
Minimize Window Named ‘%Variable%Front Window Name%’
Pause Until Conditions Met (These modifiers are not pressed: ⇧)
Unminimize Window Named ‘%Variable%Front Window Name%’
Set Variable ‘Front Window Name’ to Text ‘%Delete%’
Make sure to have the ⇧ key down when executing this, as this is the modifier that determines how long the “peeking behind” should last. As soon as you release the ⇧ key, the window unminimizes.
I called this macro “Peek Behind” and gave it the Hot Key trigger: ⇧⌘F11