I think this is the first time Jetha was slapped by his Bapu-ji, during this 31st dec. party episode (03/01/2011, Monday)
Earlier I recall him being lightly beaten up by Champak using walking-stick, when he[Jetha] was going to gambling with his friends Tarak & Sodhi during Janmashtami. But this time [31st Dec.] Jetha gets slapped on the face by his dad in front of everyone. This is unfair, Jetha is our hero, he doesn't deserve this kinda insult and humiliation in front of the society members, ladies and kids! Even Babita-ji was present and saw it! What a shame...what an sad way of starting the new year. The persons deserving to be face-slapped in front of everyone are Sunderlal & Popatlal: the most bogus and negative characters in this serial respectively.