Tapping the spacebar displays all selected files in Bridge in Full Screen Mode with a dark grey background. This is a great way to quickly review files without having to open them in Photoshop. Tap escape to return to Bridge.
If you create and save presets in Adobe Camera Raw, you can then quickly apply those presets in Bridge. Simply Control -click (Mac) | Right Mouse -click (Win) on the image thumbnail and select Develop Settings > (your preset name).
Since I still get this question quite often, I thought I would repost this video on “Should I use Lightroom or Bridge?”