I think that's a fine play... There's NO WAY he's got you on 28, and I wouldn't be worried about trips so much as 6,8... But, like you said "what the hell", and if he's got 6,8 I'll take my lumps... I think if you call his bet, there's WAY too many scare cards to keep playing w/... Push early and give the decision to him...
Thats what ya get for limping w/ Kings...