Cannot get the excerpt to show outside the loop… code provided.

I’ve searched many threads in the forum and found a solution to outputting the excerpts of post without being inside the loop… Only the solution I found doesn’t work… What is going on?

function wptuts_recentposts($atts, $content = null){
global $post;
$list_start = '<ul class="recent_posts">';
$list_end = '</ul>';
$output = '';
$recent_posts = wp_get_recent_posts();
foreach( $recent_posts as $current_post ){
get_post($current_post["ID"]);
$excerpt = $postid->post_excerpt;
		$output .= '
<li>
	<div class="recent_wrapper">
		<h4><a href=' . get_permalink($current_post["ID"]) .  '>' .   $current_post["post_title"].'</a></h4>'. get_the_post_thumbnail($current_post["ID"], array(75,75)) . $excerpt . '
	</div>
</li>';
	}
return $list_start . $output . $list_end;

}
add_shortcode('recent_posts', 'wptuts_recentposts');