OBS/INT or none?

[mbyron]

Question 1: Not OBS, since the fielder is not hindering the runner's attempt to advance. But it might be malicious contact, and if I judge it to be intentional it won't result in an out.

Question 2:Yes, one is blatant and the other is subtle.

Question 3: Yes, it matters whether the runner is paying attention to whether time has actually been called.

Other than that, I think SDS nailed it.