Others occur when people do know what to do, in fact that may have successfully done this thing before many times, but they still make an error. These errors are called slips. Examples include leaving your change in a chocolate vending machine or forgetting to replace the petrol cap after filling up your car with fuel. Or even accidentally typing a wrong word when you’re writing a text, even though you know how to spell it, sometimes you’ll still type it wrnogly. To understand a little more about slips, have a read over Stacey’s railway station bathroom story.