Chickened

I wanted to ask Mary out but I chickened out at the last moment.

Tom chickened out at the last minute.

Tom chickened out and didn't try bungee jumping.

Tom chickened out.

Tom thinks Mary chickened out.

I chickened out.

I can't believe you chickened out.

Oh please, you chickened out at every opportunity. Not only that, but did you ever think about the consequences of you being oblivious to her, what that must have done to her self-esteem?

Don't tell Tom I chickened out, OK?

Tom was going to go hang gliding, but then he chickened out.