~ひょうしに(~拍子に)   => the moment [A], unintentionally / inadvertently caused something to happen N1
この / その / あの => this / that N5
Spatial relations
...そのもの => Myself... N2
Demonstrate by example
ものの => but, although N2
Things do not match the prediction
その...その => Every... N1
Happens next
ものの => but, although N2
そのものだ => exactly ~ N2
Consider it
~のは…ぐらいのものだ => only (emphasis) N1
Limit
~のなんのと => For example... N1
Demonstrate by example
の => of N5
の => Complements N5
Explain
... の => Let's... N4
Order