Xabi Zurutuza of Spain for Red Bull KTM Ajo crashes during Moto3 Free Practice Three as part of the Australian Motorcycle Grand Prix at the Phillip Island Grand Prix Circuit in Phillip Island, Australia, 19 October 2024. (Photo by Joel Carrett/EPA)

Participants of the “Lady in red“ procession, marking the day of the Summer Solstice, walk on a promenade of the Yenisei River in Krasnoyarsk, Russia on June 22, 2019. (Photo by Ilya Naymushin/Reuters)

Spanish MotoGP rider Joan Mir (R) of Team Suzuki Ecstar and other MotoGP racers ride mini electric motorcycles at a fan event at Twin Ring Motegi in Motegi, Japan, 17 October 2019. The event was held ahead of the MotoGP race of Japan's Motorcycling Grand Prix scheduled for 20 October 2019. (Photo by Toru Hanai/EPA/EFE)

A view of the start of the 37th Gotland Grand National motocross race in Visby, Sweden on October 24, 2020. (Photo by Soren Andersson/TT News Agency via Reuters)

Giant panda Xiao Qi Ji plays at his enclosure at the Smithsonian National Zoo in Washington, Thursday, September 28, 2023. (Photo by Jose Luis Magana/AP Photo)

Olympic medal winning twins Jessica (left) and Jennifer Gadirova celebrate their GCSE results at Aylesbury Vale Academy in Buckinghamshire, United Kingdom onThursday, August 12, 2021. (Photo by Steve Parsons/PA Images via Getty Images)

Everyone wants to get something for nothing - whether it's a lucky upgrade that means you can turn left when you get on a plane instead or heading off into the economy seats, or even getting a few extra features thrown in for free when you buy a new car.

As some of the sharpest businesses around, no-one understands this quite as well as casinos and that's why they all have a system that they call comps. It's short for "complimentary offers" and these are special treats specially designed to reward you for your loyalty to the casino in question. They're basically bonuses.

Camera trapper Xavier Hubert-Brierre put this large mirror on the side of a road through the jungle in Gabon and left a camera there to record how the animals would respond to their own reflections. A silverback gorilla thought it was seeing another silverback and responded by trying to scare off the potential challenger… (Photo by Xavier Hubert-Brierre/Johns Hopkins University Press)