Let me pass you this invisible baton... which I'm sure I left around here somewhere.
objectithing for your ongoing delight.
The next object, which has but the most tenuous link with steam engines, is:
VEGETABLE and MINERAL
(boo meringues) I'm not sure the throwing angle is all that important but you must hold the asymmetric end and impart as much spin as possible. Mine is quite big (14" arms, 2" wide, marine ply) and I wouldn't like to be hit by it.