Side swipe on Keyboard to Delete previous word
Bumbled onto this nice little trick...
so you are typing away, and you look up and realize the last word you typed is completely wrong... (mis spelled, or you want to change to a different word)...
Generally one would press the Backspace button a bunch of times... but can be a bit of a pain in the a$$
However, if you simply swipe your finger from right to left accross the 'keyboard' it will automatically delete the last word, and your cursor is correctly positioned to re-type the correct word!
Very cool...