1: Heidi Gardner breaks character during SNL's Beavis and ButtHead sketch.

2: Gardner's unexpected reaction took viewers by surprise.

3: The SNL star couldn't contain her laughter in the skit.

4: Gardner's genuine moment went viral online.

5: Fans praised Gardner's comedic timing on social media.

6: The Beavis and ButtHead sketch became an instant hit.

7: Gardner's laughter added an unexpected twist to the skit.

8: Some viewers speculated Gardner's break was unplanned.

9: Gardner's unforgettable moment showcased her comedic talent.