By freak out do you mean the hard drive blinks like mad and the screen sits blank for a bit?
By default there is an option called hybrid sleep. This is a combine of S3 and S4, the system places all memory on the hard drive but instead of powering off after enters normal sleep. When you wake the system it wakes from memory fast. If the power goes out, the system will then be able to resume from Hibernation.
While this is a fool proof method since even in a power out it can wake up after, it takes much longer on systems with more memory, You can try to disable hybrid sleep in the power settings.
in start search type power. Under control panel there should be on called power options. Once in a window, click Change plan settings. On the...