So,on the zombie map "The Giant",I just activated the gobblegum ability that let's you spawn in a Fire Sale power up. After spawning 2 of them, I hit the box probably around 7-8 times. After that,I could not use my last Fire Sale spawn,use any mystery box,buy any gobblegum,or switch to any of my other guns.The only way to be able to do any of those things again was to down myself. Stay away from this gobblegum,because this is a glitch that can very easily end your game.