Top Brick Builder - LEGO® Technic Pull Back [42072] 135 pieces WHACK! Building Instructions | Facebook | By Top Brick Builder | LEGO® Technic Pull Back [42072] 135 pieces WHACK! Building Instructions
LEGO 42072 Technic Whack Racing Car Toy with Powerful Pull-Back Motor, High-Speed Action Vehicles Building Set
MOC] 42072 B Model - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Lego Technic combinations: beast on the left side is 42072+42073 (BASH and WHACK) while beauty on the right side is 42058+42059 (STUNT TRUCK and STUNT BIKE). : r/lego