Possible Hydrolocked Engine?

Hello, my brother used SeaFoam in his 97 Sunfire. He started the car and put in a full can of seafoam in the throttle body. The car stalled like normal with seafoam. Then when trying to restart it it would not start. Could it be a possible hydrolock? I am going to take out the spark plugs and crank it over for a second, then place all new spark plugs in the car and hopefully that works. Any idea's?

Was it not cranking or cranking and not starting? If it's not cranking, then pull the plugs... crank no start, try holding the pedal to the floor while you're cranking it to clear the seafoam out of the cylinders.