Apparently, setting the suphex.dat file to this:
<VARIABLES>
<besttime0>...</besttime0>
<besttime1>...</besttime1>
<besttime2>...</besttime2>
<besttime3>...</besttime3>
<besttime4>...</besttime4>
<besttime5>...</besttime5>
<unlockedhyper0>1</unlockedhyper0>
<unlockedhyper1>1</unlockedhyper1>
<unlockedhyper2>1</unlockedhyper2>
<finishedhyper0>1</finishedhyper0>
<finishedhyper1>1</finishedhyper1>
<finishedhyper2>1</finishedhyper2>
<tutorialflag>0</tutorialflag>
</VARIABLES>
(...=Don't change)
and loading a hyper mode, after the tutorial is finished, you will get negative time. Here's an img:

EDIT: This img is real!