Fasten your seatbelts, M&A lawyers. To paraphrase the glorious Bette Davis in "All About Eve," it's going to be a fast and potentially bumpy ride.

Deal flow has accelerated this year, and it will likely only continue, but top dealmaking lawyers anticipate some turbulence might develop along the way.

"Things ought to be on fire, and they are on fire," says Bob Profusek, who chairs Jones Day's M&A practice. "Every law firm would say they have deals in the pipeline."