You are sat at your desk. Most people take lunch on or at half past the hour. The kitchen is free at 20 minutes past so you decide to pop your frozen meal in that takes 6 minutes, plus another 6 and go back to your desk, which is located within 10 paces from your desk.
Colleague comes upstairs at 25 minutes past and goes into the kitchen. You hear huffing, puffing, banging and "Fuck sakes" because the microwave is in use and he stomps into another room.
Do you:
A) Wait for your food to finish cooking - total time 12ish minutes and think tough luck.
OR
B) Take your food our after it finishes it's first 6 minutes and offer microwave to colleague as he only has soup then put yours back in afterwards.