on the sign-up list and asks the audience to give the performer an introductory round of applause. Performing first at an open mic puts the comedian at a disadvantage due to the audience being "cold" and is considered the most challenging spot to perform in. Stand-ups usually use the second person to address the audience. In 2011, writer Rob Durham said that an open mic night should be no longer than 90 minutes and consist of no more than 15 acts. A comedy open mic will not normally exceed 30 people, which comedian Hannibal Buress has cited as the maximum number of people who should be there. It is common practice for stand-ups to record their sets for later review and rehearsal. The collective feedback from different audiences has a significant impact on how a stand-up routine is shaped. The host will flash a light at the comedian one minute before their time is up as a signal to finish the joke they are currently telling, a practise known as "getting the light". In modern times, this is done with the flashlight from a cell phone so as not to distract the audience with a larger or brighter light. If a comedian ignores this light and continues to perform past their allotted time, this is known as "blowing the light" and may get the comedian banned from performing at that venue. Other types of comedy open mics include "booked shows" and "bringer shows". Booked shows have a normal format, but performers reserve spots one week to one month in advance. Bringer shows are presented in a showcase format, with each performer being required to bring 5–15 people with them (with a cover charge and a two-drink minimum per person) in order to secure stage time, but this is widely seen as exploitative. Poetry, rapping and spoken word Poetry and spoken word open mics feature a host, who is normally a poet or spoken word artist, poets and spoken word artists, and audience members. Sometimes open mic nights have featured readers, or are part of a writing workshop, but generally a sign-up sheet is available for anyone interested in participating. Each participant is then called to come to the microphone and read a selection or two. Writers may attend an open mic to try out a new piece for an audience or to find out more about the local writing community.