The phrase "real jolt" means a strong and sudden shock or surprise that is unexpected and can cause a person to be fully awake and alert. Full definition
It wasn't until a 1979 law legalized home brewing that the beer industry saw a real jolt. (fortune.com)
If you're used to having support staff at your beck and call to handle matters large and small, you could be in for a real jolt of culture shock on your first solo day. (entrepreneur.com)
The real jolt of electricity came with our first Big Baseball Brawl of the season. (sbnation.com)