After a bumpy start his campaign imploded.

BBC: Newt Gingrich and his campaign legacy

Mr. Johnson spoke of his experience at Apple stores, told about the bumpy start at JCPenney including the need of having fair and square pricing, the need to fire up the Internet sales, which had fallen sharply due to the fact that at least 50% of sales were in home furnishing.

FORBES: J.C.Penney slides Further into Oblivion

At the newly christened Rocky Rapids we took a stop-start, bumpy slide down a tiny rocky waterfall, while at the section of the river called Lake Balboa Ledge, we had to get out and walk among huge boulders.

BBC: Paddling Los Angeles�� rebounding river

The decline in the share of Americans working in start-ups has been bumpy, with periods of increase as well as periods of decrease.

FORBES: Startups as Employers