for the first time in my life, i'm actually finding myself occasionally confused between user interfaces.
a few examples:
at my pc, i wanted to right click on a file, but instead i held the left mouse button while pointing at it, the way i would on my phone...and was surprised when it didn't work out as expected. my first surprise was when nothing happened and the bigger one was when i realised what i just did!
on my phone,when wanting to type 0 (which is on the "p" key), i pressed and held the key down (they way i would have on the n-gage), instead of using the "symbol" modifier key.
words of wisdom: the more similar two things are, the more confusion they create.