I bought "Explosive Bricks" from the store intending to save them for clearing obstacles, but after using them in the jungle level, they got stuck on vine-like bricks and couldn't be triggered. Just as I was about to give up, I discovered that the stuck explosive bricks exploded upon contact with the compression line, blasting away surrounding miscellaneous bricks. A "Chain Explosion" pop-up appeared on the screen, revealing that this item could trigger a chain reaction with the compression line.