Not so much a joke, but a funny anecdote:
Last year at a UNSW astronomy outreach evening, after the talk a viewing session was planned. So, as we left the lecture theatre, Peter Hickey (hickny here on IIS), & I saw four or five 'professional' astronomers wrestling with a lovely new Meade SCT. I mentioned to Peter "bet we finish up setting up the scope for them".
As we approached these decorated professionals, I called out "how many professional astronomers does it take to set up a scope?". Needless to say I can't repeat here how they responded!
And yes, we did set up the scope for them, & showed them how to use it too,
!
Still, they are a clever lot of folk! Hats off to them.