Short Answer, yes. Long Answer, yes, but it is never called unless it is blatant or it puts a player's safety at risk. Pushing the pile is not ever called. Pulling a player forward is both dangerous and blatant If a player is blatantly pushing a pile forward, an official is most likely going to blow the whistle to stop the play and declare that forward progress stopped when the player began pushing the pile. A distinction should also be made between pushing a pile (not blatant) and pushing a player forward (blatant).
Rule 12, Section 1, Article 5, of the NFL Rulebook states that "No offensive player may: ( a) lift a runner to his feet or pull him in any direction at any time; " Penalty: For assisting the runner or for interlocking interference: Loss of 10 yards.
Technically, yes, it is illegal to advance the runner. The official penalty is called "Helping the Runner." It is rarely enforced, however.
As long as the coach does not assist the runner, there is no penalty.
There is no penalty for knocking down a hurdle when attempting to jump over it. Although, I guess there is one penalty and that is the runner will not be as fast because of hitting the hurdle. But a runner will not be disqualified for knocking down a hurdle.
No runner is allowed to be touched while running the bases. Only a bad umpire would enforce this rule on a high five. There is no rule that prohibits touching a runner, but there is a rule prohibiting physically assisting a runner.
An incomplete pass, runner goes out of bounds, penalty, or after a score is made
If a base runner is hit by a batted ball before the ball contacts, or passed an infielder they are out... once the ball passes, or is contacted by an opposing player there is no penalty for being hit.
The rules of competition at the 1904 Games stated that a runner would be given a two yard penalty for a false start.
yes,the base runner going to second base is called out,by interference.
By definition, a balk can only be committed when there is at least one runner on base. http://mlb.mlb.com/mlb/official_info/official_rules/pitcher_8.jsp
Assisting or aiding.
Assisting has three syllables: a-ssis-ting