My 5 year-old boy's favourite joke:
Knock knock...
Who's there?
Interrupting cow.
Interrupting cow w-
MOO!
If my investment in this comes right I will try to explain to him why replacing "interrupting cow" with "surprisingly rapid share price movement" is funny.
More on point: could someone explain to me how the 'queue' works (or point me towards a suitable resource)? Many thanks!