蹿⇒ 蹿 cuān, [躥], to leap up/(coll.) to gush out/to spurt out
蹦⇒ 蹦 bèng, to jump/to bounce/to hop 活蹦乱跳 huóbèngluàntiào, [活蹦亂跳], to leap and frisk about (idiom); lively/healthy and active 蹦蹦跳跳 bèngbèngtiàotiào, bouncing and vivacious 欢蹦乱跳 huānbèngluàntiào, [歡蹦亂跳], glowing with health and vivacity (idiom)