7 Engineers and 7 Doctors

7 Engineers and 7 Doctors are going from Pune to Mumbai. So they gather at Pune Station.  Both groups are desperately trying to prove their superiority. 

SCENE 1 (PUNE- MUMBAI) : 

7 engineers take only 1 Ticket and 7 doctors buy all 7 tickets. 

When the TT arrives, all 7 Engineers get into one toilet. When the TT knocks, one hand comes  out with the ticket and the TT goes away.

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They are now returning from Mumbai to Pune and decide to break the journey midway at Lonavala (a stop on the way)

SCENE 2 (MUMBAI - LONAVALA) : 

Doctors decided, that they will outwit the Engineers this time. The 7 Doctors take only 1 Ticket. Engineers don't buy any ticket at  all !

When the TT arrives, all doctors get in one toilet and the engineers occupy the opposite one. 

One engineer gets out and knocks the door of Doctors' toilet, One 
Hand comes with the tickets, he takes the ticket from them and enters the other toilet.

When the TT knocks on the Engineers' door, they produce a ticket, but the doctors can't as they don't have one! So he drives out all the doctors from the toilet and they are fined  heavily.

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On the next part of the journey.

SCENE 3 ( LONAVALA) : 

Now both the groups are on Lonavala station and with the doctors
planning their last move, they board the local train to Pune.

This time doctors decide that they will play the same (1 ticket) trick. 

Doctors take only 1 ticket among them. Engineers buy all 7 tickets this 
time.

When the TT arrives, all Engineers show their tickets.

Doctors are still searching for the toilet in the LOCAL train! coz -(local trains  don't have toilets)