Complex sentence: Rudd was involved in a horrific crash in the Busch Clash at Daytona, in which his car went airborne (in a crash that Ned Jarrett described as something like a "bucking horse") before suffering a concussion.
Split into simpler sentences: Rudd was involved in a horrific crash in the Busch Clash at Daytona. Rudd's car became airborne (in a crash that Ned Jarrett described as being like a "bucking horse") and he suffered a concussion.