But I figured...

That's my new favorite phrase. Probably because it seems to be an excuse for doing exactly what you want regardless of other advice/instruction.
For instance:
"I know the sign says your office is closed right now but I figured since the door was unlocked..."
"I know I had to do those questions for our study group, but I figured that my partner had it all covered..."
"I had to cancel, but I figured that you could make time later..."
"I know my LSAT and grades aren't high enough, but I figured..."

On a less snarky note, I'm taking my last test before Thanksgiving this afternoon. Let the celebrating begin! From here till Thanksgiving, it's just me, the practice rooms and my flute. Sooooo excited!