The phrase "and collapsing in a" is grammatically correct and can be used in written English.
It can be used in contexts where you want to describe someone or something that is falling down or failing, often in a dramatic or sudden manner.
Example: "After hours of intense debate, the committee finally reached a consensus, but the tension in the room was palpable, and collapsing in a heap of exhaustion seemed inevitable."
Alternatives: "and falling into a" or "and crumbling in a".
I remember dragging myself out of bed in the morning and struggling to stay cheery as I made breakfast and waved them off to school, before coming home and collapsing in a heap on the hallway floor.
When mainstream American culture was largely about standing in a factory line, or crowding into smoke-stained boardrooms for meetings, or even dropping acid and collapsing in a field for your hundred-person "be-in," the idea of retiring to a dimly lit table to make up stories with three or four friends seemed fruitless and antisocial.
Then Ms. Selimaj, fighting back her own tears, delved into her odyssey, recounting being herded to the train station in Pristina by Serb soldiers, spending four days with no food and collapsing in a white medical tent, "just like that one," at the Macedonian border.
His Test return had lasted only 14 minutes while Roberts paid the price for going in high on Gonzalo Tiesi and collapsing in a heap after his head clashed with the back of Tiesi's.
It'll be like knock-a-door-run, but instead of legging it and collapsing in a fit of giggles because we pissed off the dickhead at number 12, we'll be sticking around and encouraging people to get off their arses and exercise their rights.
When my father suffered a heart attack and collapsed in a Brooklyn supermarket, he was surrounded by people.
A few passers-by clapped as the man crossed the line and collapsed in a heap on the floor.
As they were being tended to, several other horses became disoriented and collapsed in a dominolike chain.
An important consideration, she explained, is "the flop factor" — as in, furniture that invites a person to flop down and collapse in a heap.
The victim was reportedly trying to escape a hail of gunfire when he was struck, and collapsed in a vacant lot.
One by one, they trip up and collapse in a heap even before they have had a chance to connect with the ball.
