It was supposed to be funny , but i forget half of the part of the joke xD
For me i sees it quite funny xD
My chemistry teacher told a joke to us ( we are suppose to laugh at it ><)
Well, we learned about types of chemical reaction.
Then there is Displacement, Synthesis , Decomposition and etc . . .
A, B, C
B and C are room mates . C and B does not get along well with each other. Then, C meet with A. A is more acitve than B. Hence, B and A are friends.
AB+ CD -----> AD + CB
A and C switch their partners because they do not get along well with their room mate. Then A meet up with D and C meet up with B.