This article is from the Star Trek Tech FAQ, by Joshua Bell inexorabletash@hotmail.com with numerous contributions by others.
Something similar happened in "Bloodlines" [TNG] when Picard's "son"
was beamed off a cliff face and ended up standing on the transporter
pad. This implies that either the transporter can rearrange the
various components of your body, which implies that it has a deep
knowledge of biology (and this isn't supported), or that whilst in
transport, some sort of force field "nudges" the transportee into an
appropriate body position. So if you beam from the smooth transporter
pad to bumpy "Planet Hell", the surface you feel under your feet while
in transport distorts; you have time to adjust your balance before you
materialize. (This has been suggested a number of times on
rec.arts.startrek.tech, most recently by Ron Klapperich.)
 
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