1002 ways to goof up (continued)

I've committed all of these at work recently:

520. Accidentally ruin the settings on your ergonomic desk chair.
519. Forget to put your lunch away in the refrigerator. Yuck! room-temperature yogurt.
518. Answer the telephone wearing a headset receiver but fail to hit the headset button--so you sound like you're speaking into the telephone from across the room.

Plus this one that I've committed before but not lately:

517. Answer the telephone only to find that it was ringing only in a television program.