Call yourself an engineer?
You don't even know whether your a$$hole is punched, bored, or countersunk!

Some years back, at SYD, an arriving 743 'landed' about 20ft AGL.
Came from the tower... Erm, .. Thai-xxx, When you've put your teeth back in, take taxiway x and call ground on ...
There were a few sniggers in the background.

USAF Navigator training flight, many decades ago.

Student nav, about 10 minutes behind the airplane, struggling to resolve his fix, and compute the corrected heading, finally hits the interphone button and says: "Pilot, Nav, turn right to heading 365."

<pause, hehe> Pilot replies: "Nav, it just doesn't go that far...."

<no pause> "Pilot, Nav, well, just turn it as far as it goes."

In the BAe (previously Hawker) Dunsfold Flight shed - 2 little signs...

Above the inspection office door ....

' If you can't do it - view it '

Above the Rolls Royce office door - one of the old fashioned small white plasticky public signs ...

' No Hawkers '