Coins on Note

The Bet
A tower of 20-ish coins are placed on top of a £5 note. The bet is to remove the £5 note without disturbing the tower of coins.

The rules:
    Nothing can touch the coins except the note and the table beneath it.
    The coins must remain in a straight tower as it looked at the beginning.

The Scam    
This seems like it would require a lot of practice, but you will be able to do it straight away. You will need a pen/pencil and you will start to roll the note around the pencil then roll the pencil towards the tower of coins. This will push against the tower, and rolling it slowly will keep the tower in place, while removing the note.