Funny board 30Aug06

Event: 30Aug06 Bridge House competition
My partner: a new know F7 student, thx Kei introduce

I am South, hold this hand:
S: K84
H: 987653
D: AK96
C: -
Vul: EW, open bid by E
Bidding:
E S W N
1D 1H 1S 3H
- 4H X -
- -

When my partner open his hand, quite disappointed with a little bit angry said: "my bid is preemptive". I reply "i know" (but actually i am not so sure, i just think it is half half). He then go away (may be just go to toilet, i don't know).

His hand is:
S: Q753
H: AJT4
D: T32
C: 64

When he return, i just made the contract (certainly, and is lucky :)