Just a quick comment that in our laboratory we see that the self-reported effects are as Jeff describes. Typically about four hours or so after people smoke, the perception of high has declined and data are returning back to normal; heart rates are back to normal, and so on.
Evidence of meeting #62 for Justice and Human Rights in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was drivers.
A recording is available from Parliament.