Related Clues:

• Ignore the cue cards
• Avoid the lines?
• Spontaneous remark
• Unscripted
• Remark that might get one in trouble
• Deviate from the script
• Ignore one's lines
• Perform without preparation
• Speak without a script
• Surprise one's costar
• Do improv
• Speak off-the-cuff
• Off-the-cuff quip
• Drift from the script
• Improv line