How often do you forget stuff instantly?

[El Diablo]

OK, three scenarios here:

1) You are talking to someone. You introduce yourself. 10 seconds later, you realize you have no idea what their name is.

2) You decide to do something (grab a bottle of water, maybe) on the way out of the house. You realize you forgot something and turn around to grab it from your room. You forget your initial task and leave.

3) You are watching something on TV. Commercial comes on, you flip channels and watch something for a few minutes, then totally forget about the first thing you were watching.

Just curious, how many of you forget stuff like this, and how often?