if you take too big a stride, you could easily rip your balls (catchphrase) (line spoken by actor 葛優|葛优[Ge3 You1] in the 2010 action comedy movie 讓子彈飛|让子弹飞[Rang4 Zi3 dan4 Fei1]); (fig.) take things one step at a time
trad. 步子太大，容易扯著蛋
Also written 步子太大，容易扯著蛋【bù zi tài dà , róng yì chě zhe dàn】