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general::
Phrase(s): drop across someone or something
[for something long or wide] to fall on and lay on someone or something. • A snake dropped across the hood of the tourist bus as it passed under a tree. • As I lay sleeping, a ceiling panel dropped across me and woke me up., Phrase(s): drop something across something
to let something fall in such a way that a span is bridged; to let something fall in such a way that a pathway is blocked. • Let’s drop a little rug across the threshold. • They dropped a huge boulder across the road so no one could pass.
McGrawhill's American Idioms And Phrasal Verbs