MONSTA X is back with another dance practice for their latest single!

On January 23 KST, the boy group unveiled the 'liar version' dance practice for "Beautiful Liar." This time around, the members drew a penalty card that told them one member – the designated 'liar' – must wear a heavy sandbag weight around the ankle while performing the choreography. Viewers of the video were then asked to guess which member they think is wearing the ankle weight as the members tried their best to dance without appearing like they were wearing anything heavy at all.

Meanwhile, "Beautiful Liar" is the title track off of their 12th mini-album 'Reason.' The original music video can be watched here.

Check out the full video above!