Sherdog has some excellent examples of warmup exercises people hate:
Begin from a standing position.
Drop your hand down towards your feet and jump both feet back away from your hands to a push up position. For added intensity, you can add a single push up after your get into the push up position.
Then, jump your feet back towards your hands and stand up back to your starting position. For added intensity, you can add a full jump as you stand up.
Start with your stomach on the floor and lift your chest up high using your arms. With you legs held ‘limp,’ drag yourself across the floor only using your straightened arms. Hands face backwards fingers towards torso.