Here are a couple classic MMA exercises you can do anywhere. All you need is a wall. From 3 rounds with no resistance for a quick 9 minute warmup, to 5 rounds with resistance for a 15 minute burn, you can scale this up or down depending on your fitness level.
The 3 exercises covered in this video are:
Situps
Wall Walks
Single Legs
3 - 5 sets
:30 seconds - Situps
:30 seconds - rest
:30 seconds - Wall Walks
:30 seconds - rest
:30 seconds - Single Legs
:30 seconds rest