Final answer:
In 'Of Mice and Men', Lennie's actions that could be interpreted as having a temper are more often unintentional displays of strength rather than malicious intent.
Step-by-step explanation:
The question seeks a quote from John Steinbeck's novel Of Mice and Men (OMAM) that illustrates that the character Lennie has a temper.
An example of Lennie's temper flaring up is not explicitly described in the provided reference texts. Instead, the texts offer insights into different characters and themes. In Of Mice and Men, Lennie shows unintentional aggression rather than outbursts of temper, such as when he accidentally kills small animals or, tragically, when he accidentally kills Curley's wife due to his failure to control his own strength.
A specific quote from Steinbeck's text would be needed to perfectly answer this question, and that quote should reflect an instance where Lennie's responses are disproportionally intense or aggressive in a given situation. For example, when Lennie crushes Curley's hand after Curley attacks him, showing that Lennie can respond with significant force when provoked, however this is more reactionary than indicative of an inherent bad temper.