If you set it up like in the screenshot and put a lot of tnt minecarts (al least 4) onto the same rail and power the button, the minecarts will move and ignite because of the activator rail and when the tnt minecarts explode at the same time, it creates a huge crater. Just like a nuke.
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Duplicate of MC-7867, please use the search function to see if your bug has already been submitted. Currently over 49% of tickets are being closed as duplicate.
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