if "nudged" back into play it'd be considered a "bang back" and for tournament play would result in a DQ

https://www.ifpapinball.com/ifpa14/rules/

7. Death Saves, Bangbacks, etc.

Techniques known as “Death Saves” and “Bangbacks” are sometimes employed by certain advanced players. Because the effectiveness of these techniques varies from machine to machine, and because of the risk of injury to either player or machine, these techniques are banned from tournament play. In the event that a drained ball bounces back into play without deliberate player action, such as in the case of a “lazarus”, this is considered the mechanical nature of pinball and the ball may be played. If this situation occurs repeatedly, and there is question as to whether the lazarus ball was naturally occurring or induced by the player, tournament directors may end the game in progress and award a score of zero.