Yes, almost unbelievable General. He does have a cannon for a serve. Doesn't hurt to be serving from the clouds either.
Memo to young Dynamitrov: Psst. You can't win if you can't break. You need to return better. Read it better, and when you get the chance, stop taking big cuts at a Karlovic serve. Short backswings and/or block it back with accuracy. It will go back fast enough, and if it's to the right location, Karlovic doesn't move well enough to track it down.
Example:
Respectfully,
masterclass