The scene where the assembled English army gets mooned by THE ENTIRE NATION OF SCOTLAND.
"They can take our lives... but they can never take OUR FREEDOM!"
The final scene, when Robert the Bruce forgoes a losers peace to lead his army against the English at Bannockburn.
"You have bled with Wallace. Now bleed with me."
Made all the more poignant by the tiny shift in Hamish's expression; a narrowing of the eyes, a shift of the jaw, telling you that the mood has, in that one line, gone from bitter resignation to undisputed CMOA.
And as he does so, he hurls Wallace's sword across the field, before they charge towards the English.
When Wallace is being executed, he is offered the chance to cry "mercy" and have the torture stop. When he finally speaks, having remained silent throughout, he only yells "FREEEEEDOOOOOOOOM."