PITTSFORD, N.Y. -- A hush went over the crowd.

After jumping up to catch a pass and coming down hard, Buffalo Bills wide receiver Sammy Watkins was slow to get up following a play late in Monday's practice.

Watkins' teammates called for trainers, who escorted him to the sidelines. Coach Doug Marrone even went over to check on his first-round pick.

As it turned out, Watkins simply had his eye poked.

He was back into practice soon after but it was the sort of moment that captured fans' attention both at St. John Fisher College and across social media.

Watkins' scare was the highlight of Monday's practice, one that also included linebacker Brandon Spikes leaving for apparent heat-related issues. Spikes removed his gear and was placed in a cooling tent about halfway through practice.

Meanwhile, rookie linebacker Darrin Kitchens was carted off during a special teams drill, while cornerback Brandon Smith limped off the field in a subsequent drill.

The back-to-back injuries are a reminder that the Bills, with the NFL's longest training camp, will have to endure the summer. An injury to Watkins -- or second-year quarterback EJ Manuel -- will be a major setback. The Bills dodged a bullet with Watkins on Monday.

Fortunately for the team, they had two more players avoid serious problems after leaving Sunday's practice. Wide receiver Marquise Goodwin, who dealt with complications from sickle cell anemia on Sunday, was back practicing Monday, as was Seantrel Henderson, who left Sunday's session with a hip injury.