You do not have to be witty on demand — you have to choose a device and execute it. Pick a room, try each opener on it, and read the fit verdict and the failure mode. Then switch to repair mode and fix the five openings that reliably cost a speaker credibility.
The room you are actually walking into
The menu — dot shows fit for this room
Topic held constant: bystander CPR and public-access defibrillators. Choose on audience, not on which one you enjoyed writing.
Five openings that cost you
What it costs
Choose a deviceEvery opener on the menu can be done badly. Pick one and see how it lands in this room.
Your first sentence—
The anyway test — your second sentence—
—Pick a room on the left, then pick a device.
Repair itOnly one rewrite actually fixes the problem. The other two move it.
Choose the rewrite that removes the cost rather than dressing it up.