Knock sb sideways/for six British Australia Verb + object/complement informal
To make someone feel very shocked, overwhelmed, upset or ill
What he said knocked me for six.
The decision my parents made really knocked me sideways.
The verb "knock" should be conjugated according to its tense.
To bear too many problems or responsibilities
I am carrying the weight of the world on my shoulders as I am the last participant who will to win or to lose our team.