Present Perfect

In no particular order:

• taking a sip of your drink while simultaneously making a sudden forward movement because you try stepping over something, causing the drink to go down the wrong pipe
• changing the kitten's litter box, but when you pick up the bag of kitty litter in the outside closet, you pick up only the handles while the sand stays on the floor because the floor had gotten wet and the sand sucked up all the water through the bag, causing it to tear
• ld on mingw not liking a leading ":" in your PATH, which libtool puts there because it doesn't check for empty variables when adding to a variable, and wasting way too much time tracking down the cause. Need to submit patch
• having an argument late at night when you both should be asleep right before the morning your girlfriend is leaving for the Old Country

In no particular order: taking a sip of your drink while simultaneously making a sudden forward movement because you try stepping over something, causing the drink to go down the...