Frenkle then makes an impromptu speech to the rest of the band.

He is not above making occasional impromptu speeches or working for a laugh.

Pias thanked them all and gave an impromptu speech, though his real talk wasn't scheduled until the next night.

A Colombian whose daughter had 'disappeared' gave an impromptu speech.

An impromptu speech, to say the very least.

It was a nice speech, as impromptu speeches went.

A soapbox is a raised platform on which one stands to make an impromptu speech, often about a political subject.

Then addressing himself to all with a short, impromptu speech.

"My son was born blind," he said in an impromptu speech.

Their he stood on the Clerk's desk and made an impromptu speech.