gape

gape 

Meaning: to stare with your mouth open because you are shocked or surprised

You gaped because there was no gap  

Keyword: gap

Visualization: Bus के अंदर बिलकुल gap  नहीं था ………..

Sentence:

I gaped at the bus because there was no gap inside.

(मैंने बस की ओर देख के चौक गया क्योंकि अंदर कोई gap नहीं था।)