[ There's a yelp as she tries to wrench her foot out from under his, so in the process of jerking back, and gripping his shirt, and being thrown off balance when he wrenches her forearm up,
that is her entire weight toppling backwards down the stairs, with her hand firmly anchored to the front of his shirt. ]
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that is her entire weight toppling backwards down the stairs, with her hand firmly anchored to the front of his shirt. ]