Possible Clues:

• Look forward to the speech, or the spitting image of it
• What the speaker's audience does before coughing
• Hawking lecture's audience will do so upon arrival
• Look forward to speech: spit it out!
• Be prepared for speech to produce coughing
• Look forward to a speech, but you get only the spitting image of one
• Look forward to a speech with saliva
• Look forward to the speech, or the spitting image of it (13)
• How one might look forward to the speaker spitting out his speech