In the two-man bob what is the purpose of the second person (i.e. the one hiding at the back who's not steering)?

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@spacemagick I imagine they're shifting their weight a little, a counterbalance. Maybe?
@sarajw
Yeah, I was sort of thinking that but they seem to hide right down inside the vehicle so they can't see what's happening so how would they know what to do? They seem to be just a dead weight passenger. Are there any other sports which involve a second pointless participant?
🙂
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