In cyclo-cross, if an obstacle or unrideable section of the course forces you to dismount, you will have to make a decision to carry or shoulder your bike. Carrying the bike can be quicker and more efficient than shouldering the bike on obstacles such as a hurdle. In some situations, such as on a smooth but unrideable climb, pushing the bike might be a better option.

Find the other cyclo-cross videos in this series here - https://www.britishcycling.org.uk/knowledge/skills/cyclo-cross