I went there and wanted to buy the new Apple Watch...

I went there and wanted to buy the new Apple Watch 4 but did not know which size and went straight to the table where they show the new model. I did not see that you have to wait in line and the staff reminded me of it in a very rude and arrogant way.
I guess I will not buy the new Apple Watch now but the Samsung Gear S3 and a new Galaxy S9 instead. For nearly the same amount of money