In Tomorrow is Yesterday USAF Captain John Christopher was sitting in his pilot seat when he dematerialized, but materialized standing with his back to Captain Kirk. This happened when the Enterprise beamed him up from his F-104 fighter.
Is there a technical limit restricting the transporter from manipulating and reconfiguring people into different poses during transport? Can it pose you any way the operator wants?
Note usually people are somehow automatically facing forward, so there must be at least some technology which can rotate people to face forward. This one instance also happens to manipulate Captain Christopher's body as well.