A fun little exploit has been discovered and is very entertaining in the right situations. It gives you the ability to attack twice with your melee weapon which is very useful for Spies. It can be useful for any class as you can use the technique and save your double attack to use at any time. Here are the directions and I will include a video sometime today:

Here is the 5 step process:

1. Select your Melee weapon (usually #3 in your inventory; #4 as a spy).

2. Melee Attack and Q (which is bound to the “lastinv” command) right away below the attack successfully lands.

3. Then, Press the Q key again to switch back to your melee weapon.

4. Once you switch, hold down your attach during the switch so that you immediately attack after the weapon switch.

5. You will then attack due to holding down your mouse and land an extra attack due to the Quick switch earlier using the Q key.