*roll x* and by replacing x with any number, 1-9. Depending on the number will yield a number with a number of digits that you put:

example: *roll 4* would give you a 4 digit number.

*roll picture* rolls a random picture
*roll comment* rolls a random comment
*roll user* rolls a random user.

The *rolls* must be made in the beginning of every comment, that is why it didn't work for me now.