phrasal
or all of a heap
1. : so as to be stupefied, amazed, or overcome
a lot of people were also struck all of a heap because … the favorite could do no better than finish third — G.F.T.Ryall
struck him so completely of a heap that he was almost a broken man — H.L.Davis
2. : all of a sudden
all of a heap they had given her perplexity, immobility, and a dreadful thought — F.M.Ford