Here’s what you should do: First off, turn off the grinder immediately and give it some time to cool down before attempting to remove the blade. Then, try gently rocking the blade back and forth while applying pressure to see if it will move out of the brick. If that doesn’t work, use pliers or vice grips to wiggle it free - but be careful not to damage the blade or hurt yourself in the process. Remember, accidents can happen even with experienced DIYers so always take precautions when working with power tools!