Brakes lock up after lifting car
 

Has anyone ever experienced your Z's brakes locking up via stiff brake pedal after putting your car on a lift over extended periods of time?

Just recently installed a CBE and HFC using a hydraulic lift. After everything was finished I brought the car back down, started it up but I couldn't press down on the brakes. There was a lot of resistance. I had to pump it for about a minute or 2 for it to get back to normal.

Has anyone else experienced this? What's the reasoning behind it?