Bash 'n' Dash is a small 8 shape inspired by Smash 'n' Bash from LEGO Racers 2. The course requires driving in both directions, not just one, and in a specific order. Arrows with numbers for both directions are there to help point out where to go.
RC1 VS Race
RC1 VS Race (Dolphin)
The full video with an explanation of the laps was uploaded separately.