Limited support
This feature is only present in Portal 2: Community Edition and Portal: Revolution.

mp_bot_fling_trail

🟦 Executable on Client

mp_bot_fling_trail <value>

When bots reach a certain velocity in the air, they will show a trail behind them (0 = off, 1 = on, 2 = fun)

Warning:

This is a cheat command and can only be used when sv_cheats is set to 1.