Valmiki Ramayana Yuddha Kanda Sarga 4 Shloka 68

ऊरुवेगैः with the speed of their thighs,अनेकशः several, लताजालानि meshes of creepers, ममृदुः broken, जृम्बमाणा while yawning , विक्रान्ता courageous, शिलाद्रुमैः stones and trees, विचिक्रीडुः whirled round and played

With the speed of their shaking thighs, the vanaras broke several meshes of creepers. While yawning also some showed their courage by whirling round and throwing stones and trees.