Answer:
well one deffinetly is that when you see something you really like and you ant have that one ecause its only on sale and it sends up bein out of stock
umm another is when your quite small and your a kidn and your lineing up 2 pay for something they push in front off you and think that your not paying fo anyhting
and last is when you see in a shop a really cheap sale and you go 2 the same shop but in different place and then its there but like 10 more pounds so you go back 2 the other place and its shut down.
hope its helpful