Want to be featured on ISO? Every Monday, we’ll announce a new theme. You’ll have until next Sunday to submit your photo as an entry. You may already have an existing photo that fits the theme, or you can take this as a challenge to shoot and upload a brand new photo.

Last week, we wanted to see how you captured the exact moment of impact. We have received 200 jaw-dropping entries — from high-speed explosions to lightning strikes. Thanks to everyone who submitted their photos. Below are the photos that made our list of favorites:

Big Bursts

Go With the Flow

Om Nom Nom Nom

Electric Feel

Natural Beauty

People Caught in the Moment

As always, we hold a random draw giveaway for all those who enter the contest. Anyone who enters will have the chance to win two months of Awesome membership! This week’s lucky random winner is Ilse Noordhof. Congrats, Ilse, we’ll contact you and upgrade your account soon.

New theme for next week: TEACHER

1. Select a photo that fits this theme. Upload the image, or pick a photo you’ve already uploaded.
2. Add the tag #500pxTeacher
3. You’re done! Track all entries here.

Because education is the #1 gateway drug. This next theme is open to your own interpretation, so grab your gear, start shooting, and tagging now! Deadline is May 25th at 11:59PM PT. Good luck, everyone! We’ll be watching this gallery fill up.