Avram Grant has warned West Ham to keep their heads if they score in tonight's Carling Cup semi-final decider at Birmingham.
The Hammers lead 2-1 from the first leg but will be without Frederic Piquionne after the striker was sent off for celebrating his late goal against Everton with supporters.
Grant disagrees with the rule, but he has addressed his players and demanded they keep any goal celebrations in check.
"I spoke with them about this. There was a saying that sometimes you need to be clever, not just right," Grant said.
"I respect the rules and I want my players to respect the rules but they are not computers and this is not a normal business. Sometimes it will happen.
"It is the rule but I don't know the logic behind the rule.
"The most happy moment is when you score a goal and it is even more important when you score a few minutes before the end, and you go to celebrate with the supporters.
"The supporters are the team. If you ask me, I would encourage players to celebrate first with the supporters and then everybody else.
"I think you need to respect any rules but you need to be a bit logical."
Grant believes West Ham deserve to land a first Wembley appearance since the 1981 League Cup final, having knocked out Sunderland and Stoke and thumped Manchester United 4-0.
But Grant knows that past achievements will count for nothing at St Andrew's.
"To be at Wembley after such a long time would be very good and, if I may say it, we deserve it," Grant said.
"Our route to this game has been very good, but we know that no-one will give us any presents. It will mean a lot also to Birmingham -- but for us it is very important.
"We have a good record in the cups this season and it has also been good football.
"We have scored a lot of goals and we want to continue like that.
"There is one more game to the final."
West Ham are also without striker Victor Obinna, who was sent off in the first leg for kicking Sebastian Larsson.
Carlton Cole is set to start up front and loan signing Wayne Bridge is free to play because he is not cup-tied.
Neither is new recruit Gary O'Neil, who goes straight into the squad after completing his move from Middlesbrough yesterday.