rule question

[crackerjack]

I always understood that when a card is exposed by the dealer when he is dealing, that card now becomes the burn card and you keep dealing and the player who's card was exposed now gets the last card on the deck.

Someone who used to be a dealer just told us the other night that if this happens when a player is getting their first card, that it is a misdeal. and if this happens when the dealer is getting their second card, then that card is used as a burn card.

Does it make a difference if it is their first card or second card? And is there a difference if it is a cash game or a tourney?

Thanks