To unfreeze the mac book pro, there are two ways :
a. <span>Click the apple logo which is at the top
left of the menu bar and then select 'force quit'.
b. Hold down the option,
command, and escape buttons and then select 'force quit'. </span>
If all else fails, best option is to hold down the power button on the keyboard till it shuts down.
A patent grants the right to sell an invention and claim it as your own
That means the device is programmed to mark the word as grammatically incorrect, if you double tap the word there should be a correct suggestion of the word instead. This may not always be the right one tho, ask someone experienced if you’re unsure.