Absolutely. It’s irrelevant if it goes out of bounds (barring end of period timing issues). And if it is recovered, it would be one of those you need to get together as a crew and talk about exactly what everybody has. Hopefully at that point somebody would recognize the situation.
Yes. Although the wings would have the best view of the whole picture, and
could make this call in real time, without having to consult, they should actually be more focused on their keys, and blocking action. The R and/or C will know about the kick block and the batting, but they should not know when/if the ball lands in the end zone. The deep guys and U may know about the ball landing in the end zone, but they probably shouldn’t know anything about the blocked kick or batting.
Let it play out, then confer and piece it together. The thing to be sure to ‘fix’ is the game clock, if it didn’t get stopped when the ball first landed in the end zone. The CO can’t stop it on his own, and the deep guys won’t necessarily know it should stop. But somebody - an ‘off’ side guy - should check the game clock and advise the crew on the time on the game clock when the ball landed in the end zone. Then, after the dust settles, the R can apply the 5/5 philosophy and put time back on the clock, as necessary.
An unusual-to-rare situation. Get video.
