An adrenaline rush can make you feel like your heart is racing. It can cause nervousness, anxiety, tingling, and shakiness.
You might recognize these sensations. Imagine you're driving and someone swerves in front of you, almost colliding with your car. Hopefully, if you're paying attention, you instinctively jerk the wheel the other way. How you feel after having avoided an accident is how an adrenaline rush feels.