Precipitately

He talked precipitately, and I did not try to stop him.

"That's that!" said Mailey, folding up the paper. "Now, Mr. Thomas Didymus, I leave you to your conclusions," and the enthusiast vanished out of the office as precipitately as he had entered.

Nawnim rushed into the bedroom so precipitately that he nearly crashed into the bed.

Despite their pre-war pioneering work in diesel rail traction, the Germans did not precipitately dieselise their own national system as soon as post-war opportunity offered.