Need Some Help Part 2

[FltEMTP]

1) Runner on 2nd base takes lead to steal 3rd. SS runs between runner and second and stands directly in front of runner. In the split second that SS blocked the view of the pitcher the runner was thrown out. This was a rehearsed play as it was used by the same team in an earlier game. Legal???

2) Same situation only as the SS passes in front of the runner, the runner takes off to 3rd. The SS passes in front of the runner as he's trying to get back to his position and they collide. The runner is thrown out. Obstruction?