Runner goes in standing up

[jicecone]

First thing, if the runner is 30 feet from the bag, chances are he cannot alter the play unless waving the arms in an attempt distract the fielder. so proximity to the base in this manner is important.

The key is, DID the runner do anything to alter the play? Sliding, standing, whatever. If so, you now have two outs.

Sounds simple, but its the easiest way to understand.

POSSIBLY, is the decision you will have to make.