The clip runs for about 2.5 seconds, so it usually works without trimming and leaves enough room for the warning to register. Download the MP3 to keep it available offline, add it to a soundboard, or select it as a ringtone or notification tone if your device supports custom audio. Keep background music below the voice so each word stays clear. For a longer warning sequence, place a danger alarm before it or follow it with bomb has been planted after the punchline.