As shorena says.
Strictly to my understanding the coinbase can (presently) be anything _up to_ 25 + sum of all transaction fees.
A miner can produce a block with a coinbase of 5BTC and it will be valid. It is just not really an economically sensible thing for them to do.
Alright. I understand now. But it's really hard to believe that someone make such high fees transactions. Would you please show me the hash of that kind of tx/blocks please? I want to have a look into them.