BouncingSnowball(const lisp::Lisp& reader);
BouncingSnowball(const Vector& pos, Direction d);
BouncingSnowball(const lisp::Lisp& reader);
BouncingSnowball(const Vector& pos, Direction d);
void write(lisp::Writer& writer);
void collision_solid(const CollisionHit& hit);
HitResponse collision_badguy(BadGuy& badguy, const CollisionHit& hit);
void write(lisp::Writer& writer);
void collision_solid(const CollisionHit& hit);
HitResponse collision_badguy(BadGuy& badguy, const CollisionHit& hit);