1.
Turning the lights off.
2.
The split second when you can't find your wallet/keys.
6.
Balloons unexpectedly popping.
10.
Walking through spiderwebs.
11.
The deep end of the pool.
14.
Ventriloquist dummies.
17.
Zoning out while driving.
20.
Needing to fart and not knowing if it will be loud.