I remember during the Brewer/National game on Thursday afternoon, July 30th, where a throw home clearly beat Mike Cameron to home plate, but the National catcher ( Nieves) made a poor attempt at a tag, Cameron slid underneath it, and was ruled safe by the home plate umpire. So it can happen where a runner can be ruled safe even when the throw clearly beats him but the umpire can't be lazy, must move himself into proper position, and must care about making the correct call.