You have a Mac Laptop with a trackpad and it seems to do funny things when you click accidentally with too many fingers or slide your fingers in one direction or another. Check out the multi-touch gestures you can use below. From Use Multi-Touch gestures on your Mac:
Tap to click
Tap with one finger to click.
Click or tap with two fingers to perform the equivalent of Control-click or right-click.
Double-tap with two fingers to zoom in and back out of a webpage or PDF.
Slide two fingers up or down to scroll.1
Zoom in or out
Pinch with two fingers to zoom in or out.
Move two fingers around each other to rotate a photo or other item.
Swipe between pages
Swipe left or right with two fingers to show the previous or next page.
Open Notification Center
Swipe left from the right edge with two fingers to show Notification Center.
Look up and data detectors
Tap with three fingers to look up a word or take other actions with dates, addresses, phone numbers, and other data.
Spread your thumb and three fingers apart to show your desktop.
Pinch your thumb and three fingers together to display Launchpad.
Swipe down with four fingers3 to see all windows of the app you're using.
Swipe between full-screen apps
Swipe left or right with four fingers3 to move between desktops and full-screen apps.