1) In the first story, an engineer volunteers to let go of a rope holding 11 people dangling from a helicopter in order to save the others, as engineers are used to sacrificing themselves for the company.
2) In the second story, a group of engineers outsmarts a group of HR people by squeezing into a train toilet together with one ticket while the HR people each had their own ticket.
3) In the third story, three HR people pray to God to help them cross a raging river - the first grows strong but struggles, the second is given tools but also struggles, while the engineer simply looks at a map and crosses the nearby bridge.